Keeps Cold Cold, Best of Anything I've ever tried
340378
If you want a drink that is already cold kept cold this cup will do the trick. It says it is vacuum insulated and it behaves that way too. I've used a thermal measuring gun and beer inside the cup is 36 degF while the outside surface of the cup was 76 degF (room temperature at the time). The inside stays cold as long as you let it. In my case the beer doesn't really last all that long, but it stays cold while it lasts.
4921886
I've only tried this with cold beverages so far, but it is quite amazing!  I can put ice cubes in it in the morning and my water stays cold, WITH ice cubes still in it, the whole day.
3610080
This cooler is amazing. It stays cold longer than any other cooler on the market. If you need a cooler that last and will pay for its self in the ice you save the Yukon Cold Locker is it.  I have researched all other brands on the market and all flaws people mention with the others Igloo Fixed with its Yukon Cold Lockers. The oversized drain plug makes draining so easy.  No more need to trip the cooler over or wait for it to drain all the water before adding more ice. Another thing I love about this cooler is the handles. They are not cheap rope ones like others have and are built to last. The Yukon Cold Locker will also keep your food colder longer using Dry Ice. The roto-molded design allows the Yukon to keep your food cold all week. No more needing to leave the woods to run get ice. I brought mine to the deer lease and we had a head to head battle between my Igloo Yukon 50 qt and a Yeti Tundra 50 qt of my fathers. The Yukon has Stainless steel Lock holes to allow you to pad lock the cooler shut the Yeti did not. The Yukon has a oversize drain plus the Yeti does not.  The Yukon handles are tougher and will outlast the Yeti. The Yukon held ice almost 2 days longer and keep the beer ice cold all week. The feet on the Yukon will allow you to change between non-skid and standard the Yeti makes you buy this as an upgrade.  The weight of both was about the same but every at the deer lease agreed the Yukon felt better and more stable holding it. Igloo has been a brand we have trusted for 60 years.  It has always been a  worldwide leader in the cooler market and that tradition carries on with the Yukon cold locker series.  I would recommend this Cooler to everyone and anytime I get a chance I do. My brother and my father recently upgraded for a Yeti to a Yukon after testing with mine for the week.  If you want to get your father something he will love for Father's Day this is it.
2526753
It actually works.  I like cold water and every cup I've used int he past, including so-called insulated ones, have failed to keep the ice alive through the night.  I was very happy to find ice in the cup, not a lot but some, in the morning for the first time ever.  If the lid has some insulation, it would keep colder even longer.  Nice cup.
2462479
This bottle keeps things COLD! I initially got this bottle after seeing a similar (prettier) bottle at a local farmers market. But after seeing a $60 price tag and almost dropping the goods on the ground as I ran away in horror. Soi started my search for a vacuum sealed stainless bottle I can put anything in and not worry.

Pros : keep it hot or cold... For several DAYS!
Larger capacity, carry handle.
Cons: heavy and only the one color to choose from.
1077157
For less than 20 bucks, I thought it was worth it to try out this thing and boy am I impressed. I have a S'well bottle that I received as a gift and know how well vacuum insulated bottles should work, but I hate the design of the skinny, no clip, tall, tip easy, awkward cap bottle and have been looking to buy something more "nalgene" like. I thought of a hydro flask, but then I saw this and tried it out first. I highly recommend it, this keeps drinks cold inside the car in 100F+ degree weather, and my ice keeps solid all day, even when left in the car for a couple of hours. Also, having a cold bottle on my desk that doesn't sweat is really nice. Get it, you won't regret it.
52766
I've bought about 5 different brands of ice packs over the years, and these are the only ones I've found that actually stay cold as advertised. They stay so cold that you can remove it and put it on somewhere else without having to put it back in the freezer first, which is useful if you have pain in more than one area.

My oldest pack of ~4 years tore recently from overuse, but I didn't mind buying a replacement since they're so cheap and effective.
2191303
This is the most amazing water bottle, or water container of any kind that I have ever owned. I like to drink A LOT of water. 40 oz was a good size to keep in the car for short trips. We have a newer minivan and this actually fits in the cup holders up front. The water stays cold for DAYS. Yes DAYS. It will stay ice cold for hours, but it will stay chilled for more than 24 hours. AMAZING. We have hot, sunny summers, and I can leave this in my car, in the sun, and come back to it and there will still be ice floating in the water. Fantastic!

The lid didn't give me any problems screwing it on. However after much use, and carrying this thing by the lid loop, the plastic cracked and I just cut the connecting loop off. This actually worked out fine because the loop used to cause the lid to hid me in the face when I drank. No real biggie. However I was slightly disappointed only because this water bottle would make an excellent defensive weapon, when yielded from the loop. But that's ok, can always use a bat if anyone tries to break in.

I ran this through the dishwasher once, which I'm not sure if was "allowed" or not. It didn't damage the bottle at all, but did fade the paint in some parts. Since then I have hand washed only.

I loved this water bottle so much that I bought a 64 oz as well for longer trips. I got the plain metal because the paint on these has a smell even after a year. I like the natural stainless much better.
2683564
Best flask I've ever owned. After a week of use I'm ordering 2 more. Keeps my water cold for a ridiculously long time. Here the best example I can offer: I filled up the flask with refrigerated water (i.e., no ice) and left the flask on my car seat while I played a round of golf on a 90 degree day. In a black car, parked in the sun. I came back, expecting the worst and found COLD water.

The flask is slightly larger/thicker than its contemporaries, but who cares.

Buy it without hesitation.
4849987
A few ice cubes into this tumbler and my tea stays cold for hours... and even in a hot car.  What absolutely surprised me was how well this insulated cold drinks.  Can't attest to the heat retention as I just cannot fathom sipping a hot drink through a straw.  At any rate, this thing is awesome.  Very well made, metal is quite thick compared to some of the flimsy metal tumblers I have.
3577082
I heard everyone raving about the Yeti and was sceptical to buy one, especially as they're not cheap, but this is indeed fantastic! I fill it up with cold water and several blocks of ice and will either leave it on the counter during the day or take it with me in the car, often leaving it in the car (in the hot sun) while I go inside to the supermarket, bank etc. Even after about 4 - 5 hours later the water that is still in there is very cold. I have taken it with me on road trips and the contents remain cold. I can leave it on the table and there is no condensation or puddles of water. I haven't not tried anything hot in there yet.
1234681
I use this all the time. It keeps my cold drinks cold for over 12 hours. It doesn't sweat or feel cold on the outside. The cap is tight enough that I feel comfortable just throwing it in my purse, it won't leak. PERFECT!
3055724
This tumbler will keep beverages cold all day long and still have ice left over at the end of the day. The best one I've ever used.
3322434
awesome for any beverage you want to keep warm or cold
2561692
I drink over 1.5 gallons of water a day and even in the winter it has to be super cold, theres not such thing as too cold so I love insulated cups.  Ive owned them all, YETI, RTIC PELICAN and OZARK and OZARK is by far the best of the four.  Not only does it keep ice longer; it comes in several different colors and the price is great (especially @ Wal-Mart: 9.99 for stainless or powder coated).  I bought the Navy and it is true many and I am seriously considering the purple sparkle because I love the color; I wish the lids matched the colors of the cups and would willing pay more for the feature.  I purchased several of these in different colors for Christmas gifts and everyone loved them,

Once I bought these I filled them all up with ice and while they all had some ice the next day the OZARK had the most and the ice remained in it longer than it did the others.  The one thing that would make this a perfect cup would be a spill proof lid, which is available here for the stainless tumbler and but I ordered it from eBay for much less.  They sell what is called a generic lid that supposedly fits all, but I am very skeptical since I tried to use the spill proof lid that was on my PELICAN and it does not fit.  Another consideration, while all the cups hold 30oz there is a difference in the shape and the height of the PELICAN 30 oz.  tumbler is8 9/11 of the lid adds another 1 at the lowest side 2 at the highest making it difficult to get out of the cup holder in my vehicle; even when I move the seat all the way back I still have to maneuver the cup to get it out so I do not recommend it for travel.
2184509
Best water bottle I have ever even tried.  I filled with ice and water and three days later, still had cold water to drink. Amazing little portable fridge for drinks!
1330995
Best insulated bottle EVER! I love that it's steel, not plastic. The lid options are great, especially paired with the new Caf lid 2.0, which is now leap proof. It stays ice cold all day. I now have one on my desk and one on my night stand, and so does my wife. Anytime we go out and about, these are the bottles we grab.

Just don't drop them on the corner of the base, you'll get a good dent and it won't sit flat anymore. I would love to see them develop a rubber base to slide over the bottom.