Glass beats plastic - but lid doesn't seal tightly
356171
I have the same product in the 6 cup size, but the lid is red - anyway, the lid does not seal tightly; if there is even a small amount of liquid in the container, and you tip it even briefly, it will leak. But the lid does stay on at least.
3826011
Well, I love the weight of it, love that it's glass, and love the solid metal top.  Here's what I don't love...it leaks and drips and it does not matter which direction the gasket is (flipped upside down or right-side up).  I'm going to keep using it and just deal with it.
2232047
I was using a large 32oz plastic jug with a lid and straw while at work for drinking water. I started noticing my stomach was getting upset after drinking the water. I went through a process of elimination to determine the source of the problem, and this glass jar was part of that process. I replaced my mug with this glass jar, along with a silicone lid I purchased previously for a different large mouthed glass mug, and also using a glass straw. The plastic jug was proven to be the culprit of my stomach issues. If the difference was minimal, I wouldn't be so convinced, but the difference is very noticeable.

Plastic isn't all bad, but it's so prevalent in our lives these days, the chemicals alone involved in it's production could just be enough to cause us problems. I've been trying to slowly remove plastic from my food and drink containers and moving over to glass and silicone.

Specifics for this mug:
Pros:
-The right size. I have small hands, and while it's filling my grip, it's not too big for me to carry one handed with confidence.
-No plastic necessary.
-Large capacity at 24oz. Most glass water bottles I've found are smaller and have plastic parts too.
-Versatile since it's a Ball jar. There are lots of accessories for Ball's jars.

Cons:
-Condensation - not a big issue for me.
-Lid contains plastic

I paid ~$16 for the jar, which came with the metal rim and plastic lid for use with a straw - I am not using those with this mug. I am using a silicone lid with a straw hole in the middle which I also purchased on amazon for ~$5. I am also using a glass straw which I purchased on Amazon in a pack of 4 for ~$14. All together, this is the highest capacity all glass setup I could obtain for the best price I could afford.

I highly recommend the mug alone, even with the lid if you plan to use it. I have tried the lid with another mug and it is okay, but not if you want to avoid plastic all together. I gave the item 5 stars, because it's a great buy all together with the lid for $16.
1805808
I really like this tumbler.  The overall look is great - the stainless steel with a matte black finish looks awesome.  It retains heat/cold really well!  This would be perfect if the lid was functional.  I like that it's clear but the slide on the lid opens and closes as you move the tumbler.  I have to hold it open and close when I use it which is very inconvenient.  I will probably have to buy a replacement for the lid.
556214
Bought it because it's glass. Comparing to the other brand I bought from bbb, it's a lot cheaper. The problem I have is the green rubber vision thing to seal the lid. If broth or oil or anything gets in there, it's super difficult to take it out and wash it and put it back.
4513743
The container is good solid glass - stores a lot, but there's this silicon ring that keeps flying around that gets a little cumbersome - and overall - the ring itself feels, fragile or delicate I want to say? Meaning I feel I can ruin it's shape pretty easily.

Also the lid in general - is weak. Pouring and the filters for doing so is eh... pretty useless as the base of the curved spout in the glass bottle dips below the depth of the lip, so there's a huge hole at the bottom in that spout at all times. You can pour a drink without turning the lid at all, so it's never, truly sealed. Maybe I'm doing it wrong (doubt it), but this seems disappointing especially when they expect you to put fruit in it.  Underwhelming.
4671691
I'm a big fan of drinking water stored in glass containers, the taste of clean filtered water is what everyone should experience on a daily basis anywhere at anytime. This container is very portable, relatively light considering it volume, and well made. The lid (when not cross threaded) seals very tightly without leaks, as other buyers have stated the lid does have a tendency to cross thread but if you tighten it with enough force you will know its on right because the lid will cinch down and make a squeak as the silicone seal presses against the glass rim or it will "pop" into the right thread track thereby revealing it wasn't properly threaded, either way the lid isn't as big an issue as some would be led to believe from reading negative reviews. ****I would like if the silicone sleeve were less "holy" making it even more protected because if it were to fall on one of the spots where the silicone is absent I believe it will surely shatter. Seeing as it is glass it will probably break someday until then I will be drinking from the best vessel to store my pure filtered water.
4791774
I bought one of each of the sizes offered. I use them to bring milk to work where I make my coffee.  The glass appears to be this,  but I was VERY surprised when I dropped it to the floor - not once,  but twice! - and the top flew off,  the milk spilled on the floor,  but it did not break or crack.  I'm either very lucky or this is strong glass and not as fragile as it looks.  (For some reason my recollection was that it was a borosilicate glass,  but in re-reading the description I do not see that mentioned.  So I am not sure.) As for the lid or "stopper," I like the fact that it is a solid piece of heavy glass,  and it does have this plastic "seal," but it is NOT leak proof. In fact,  for my purposes (using it to hold milk),  the milk does get between the seal and glass stopper. Even though the combination of the plastic seal and stopper is not a tight fit on the bottle itself,  it takes some effort to pry the seal off the stopper to clean the milk residue.  If you use either bottle for water this may be a non issue.
1093586
Bought this because everyone is buzzing about these, but was disappointed to see that the lid has an opening that cannot be sealed.  I'm sure it would work well for people who had less chance of spilling, but with small children in the house and a long commute, I ended up returning this one for a different cup with a lid that could be fully closed.
2286063
We have used the Ziploc containers for years and loved them for my kids school lunches.  Since we could no longer find them, I bought these.  The containers are a sturdy plastic, much sturdier than the ziploc.  My problem with them is that the lids don't fit that well.  I have a hard time getting them on tight, when you push one corner down, another will pop up.  I've used the press n seal over one of the smaller compartments to help with leakage--just for fruit that's not really even liquid, like strawberries or raspberries.  But even the little bit of liquid from the fruit will get into the other compartments if you don't use the press n seal.  Overall, it works as a replacement for the ones we've used before but they are definitely not as user friendly.
4258203
Double walled insulation is the key, but what of the material?

Blown glass is oh, so beautiful but expensive and oh, so breakable:&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Bodum-Pavina-22-Ounce-Double-Wall-Thermo-Iced-Tea-Glass-Set-of-2/dp/B000A5CLHA/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Bodum Pavina 22-Ounce Double-Wall Thermo Iced-Tea Glass, Set of 2</a>.

Plastic is sturdy and inexpensive but even the best gradually scratch up and accumulate gunk in the seam area:&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Tervis-24-oz-Big-T-Clear-Tumbler/dp/B0002MR2WU/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Tervis 24 oz. Big T Clear Tumbler</a>.

This leaves Yeti's kitchen-grade 18/8 stainless steel, 500.  Well, you cannot break it; I barely managed to dent it, and the O-ring secured lid stayed firmly on, preventing a spill, and they are correct about it keeping ice from melting longer.  I've been used to leaving sugar free iced tea in my insulated tumbler overnight near the bed in order to have something to drink when I wake up thirsty and melt water to take my pills with in the morning.  This doesn't work with the Yeti because I wake up to a tumbler half full of stubbornly unmelted ice!

What a nice problem to have!

Note: As you'd probably guess, the plastic lid is the weakest link in this mighty chain, but should you manage to break it or lose it, replacements are available from the manufacturer pretty cheaply.  Now, if we can only get them to offer a completely sealable lid while they're at it.

Note: Available in adult size:&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Yeti-Coolers-Rambler-30-Insulated-Tumbler/dp/B00JP9ALW4/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Yeti Coolers Rambler 30 Insulated Tumbler</a>, children's size:&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Yeti-Coolers-Rambler-20-Insulated-Tumbler/dp/B00JP9AJC6/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Yeti Coolers Rambler 20 Insulated Tumbler</a>, adult beverage size:&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Yeti-Coolers-Rambler-10-Insulated-Lowball/dp/B015AI227K/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Yeti Coolers Rambler 10 Insulated Lowball</a>, and can koozie:&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Yeti-Coolers-Rambler-Colster/dp/B00SU9ACGA/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Yeti Coolers Rambler Colster</a>.
2251746
I bought this to replace a glass french press, that I loved, but which broke. So I figured stainless steel won't break, and should keep the coffee hotter for longer. Unfortunately, it doesn't keep the coffee hotter for longer even though it is supposed to be double walled.

Another dislike is that the lid does not provide a good seal. There isn't a rubber or plastic gasket on the lid, and for some reason even when in the closed position, you can still poor coffee out of the spout. I don't know if it is poor design, or just poor manufacturing, but if the lid is closed, I shouldn't be able to see into the pot. But I can, and that's not a good feature.

Overall, I love the flavor of French Press coffee and originally wanted glass because I didn't want to taste metal in my coffee. After that one broke for no apparent reason (it was in the dish drain), I decided to try a stainless steel one. In time, I will go back to glass because I think overall, it does a better job for what it is supposed to do.
2273944
I own several of the Glasslock products including this one. I really like the solid seal they have. You can put things in your lunch and not worry about them leaking. Or you can store things in the refrigerator and not have them pick up odors.

The drawback is that the sides are straight so you can't stack them well. Some other Pyrex containers I have come with beveled sides so they nestle nicely inside one another. That's why I'm giving it four stars. Manufactures either get the lid right like this product, or the sides right so that they can stack. I'd love to find a product that gets them both right!
1658662
The glass bowls are great, however the lids definitely are not secure.  They suffice to keep solids in the bowl, but are not air tight.  Example: lidded container was storing some left over olives from a can, with a small amount of juice. Bowl got bumped, causing all the juice spilled out even while lid remained on container. I know things like this aren't designed to be stored upside down or on their sides, but really should be able to handle some basic "sloshing around" of liquids without making a huge mess. Won't be using these for transporting leftovers to and from work, that's for sure!
4917741
I love this lid.  It has a silicon seal ring which makes for a perfect watertight fit with my Kleen Kanteen.  I don't believe I've ever had leakage when the lid is screwed on tight.

The D ring is nice for carrying, but the edges are a little sharp and not so comfortable when a finger s looped through.

IMPORTANT!!: The main irritation I've had is that the silicone sealing ring sometimes slips out of it's groove in the lid and ends up falling in the bottom of my Kleen Kanteen.  If this happens to you, be sure the ring is perfectly dry when you reinsert it into the lid.  If you put it back wet, it will work its way out again very quickly.
371884
This would have been a 5-star review.

The rubber washer creates a nice tight seal around the lip of the jar. The jar glass itself is of sturdy construction, I've dropped it from waist height onto my wood floor a few times, no problem.

The only gripe I have is that the metal tightening ring on the bottom pushes and rests directly against the glass. Somehow when I was closing the jar the glass chipped off the lower rim, right where the front latch sticks up.

There should be an additional rubber washer isolating the metal latch components and ring from the glass itself, then this would be a 5/5 design.
4331073
Cons:
-The metal-on-metal sound when opening and closing really is noticeable.  It does not bother me, but if you are in a classroom, library, meeting, or near people who are sleeping, there is a chance it will be too loud.
-I was loving its look until about a month in, when I dropped it from 4 feet up onto a sidewalk.  It made two small dented regions (each ~1 mm deep with area ~1 cm^2) that are peppered with small nicks, which from up close spoils its otherwise pristine looks.  From 3 ft away it's not as noticeable.
-Also, after about 6 months of constant use, the metal ring has popped off the cap a couple of times, but I got it back in pretty easily by hand.  There are also a couple dents now on the bamboo of the lid.

Pros:
The seal is always airtight when closed.  I think I read that for other bottles that the silicone gasket can pop out, but that has never happened for me.  It's not clear from the pictures, but the handle on the lid can move.  I really like that the entire interior is stainless steel (as opposed to many with plastic lids, which defeats the entire purpose).  I figure it's the safest material, except glass, until we figure out biochemistry well enough to know which plastics are truly safe.

I've had it for about six months now and FYI I've only ever used it it for water at room temperature.  Overall I'm still content with it.