is really LEAKPROOF!!!!!!
592632
I bought this tumbler and Bodum tumbler together. And i am comparing them. This is definitely the best!!!!!

+ Leakproof (* worth 10stars)
+ light weight (* awesome)
+ easy to use
+ keeps warm
+ the price is affordable

i don't find any dissatisfaction yet. Simply love it and it a very good investment!!! ;)
3345233
Not so.  This is my second one.  The first one began leaking and the leak was slow in the beginning but after about 4 months it started leaking so bad I had to set it in a Bowl, which would fill each day.  I did request to send it back, but the company wouldn't take it.  Because I like it so much Before it began leaking, I thought I would try again.  But the same exact thing is happening.  I would not buy one of these.  Maybe they should make it out of glass.
627477
The Brimma is leak proof! I work at a warehouse and it gets tossed around but my fruit water never spills! Its also great without th attachment! Keeps my water chilled and enjoyable!! I absolutely recommend this product for everyone, finally found a winner!! (:
4455750
So, I bought this for my daughter in law for the three little grandkids and travel - probably two years ago. I picked it up at Bed Bath & Beyond. I couldn't get it - 'cause it leaked all over but she is a pro and it never leaks for her. Well, as it turned out, I was leaving a little piece out and thus the reason it was leaking for me. Again, the piece was lost for a bit and she can still use it and it doesn't leak. I think there must be some sort of skill involved - seriously. We all went to DC this fall and on a whim I grabbed it from under their counter. It was a HUGE relief we did have it as we used it every night for the four month old baby. Again, no leaking as my daughter in law set it up. Anyway, I'm on here to go ahead and get one myself since I have a cold now and realize I need something. I travel off and on so this will be going with me. I am determined not to fall into the leaking category. BTW, one thing I did realize is that it doesn't get screwed in, it just sits there. I was not only missing a piece that I didn't realize I was missing but I was also trying to screw the bottle in. Hope this helps those of you that area having leaking problems...I truly believe there is a trick to it and I am determined to master this when I get my own.
2037944
I have tried no fewer than 25 different drink holders for my kids lunches, some of which were expensive and guaranteed no leaks...and they still leaked. This is the ONLY one that I have found that truly DOES NOT LEAK!!!!
4118443
DOES NOT LEAK!!!!!! I REPEAT IT DOES NOT LEAK!!
BEST WATER BOTTLE EVER.
I have been in search of a water bottle that doesn't leak and finally after several purchases I have finally found the holy grail of water bottles!
2363514
To all the people who have said that this thermos leaks. Please direct your attention to the raised circular ridge inside the neck of the thermos. Now look at the bottom of the lid. Do you see a black rubber gasket? That gasket seals against the raised metal ridge. If you do not see a gasket, your thermos will leak. If you fill the thermos over the metal ridge, your thermos will also leak. For those who have lost their gasket, broken their lids, etc, call 1-800-831-9242 (Thermos customer support) and you can order replacements for very reasonable prices. Personally I love this backpack bottle. It holds 2 Starbucks VIA perfectly, keeps them hot a LONG time and NO IT DOESN'T LEAK.

The Thermos Nissan 18-Ounce Stainless-Steel Insulated Travel Tumbler on the other hand DOES leak http://www.amazon.com/Thermos-Nissan-18-Ounce-Stainless-Steel-Insulated/dp/B0000639WN/ref=sr_1_16?ie=UTF8&qid=1330975024&sr=8-16
3315957
My 12 year old dog would start leaking when she was sleeping. Leaving puddles everywhere. A few drops of this stuff on her treats 3 times a day, for 3 days and no more leaking!!  Great product!!!
505141
This is the best travel mug I have Ever had ~ going back to those wide bottomed ceramic mugs that set up geysers while sitting on the dashboard.  The first one was going strong at four years old when I lost it on a cross country trip.  This product is so good - I bought one for my Dad, the man for whom anything less than perfection is not good enough.

Don't know why folks have been having problems with any leaking . . . mine Never has.  I don't throw it in the dishwasher and -> per the instructions <- the lid Never goes in the microwave.  I have put this in my pocket and my pocket book without leakage.  I have dropped it on concrete while full and it stayed sealed.  The only traveling beverage holder I have purchased that was as tough and leak proof as this is the stainless steel, screw top bottle I use for water.

Did they make sure they had tightened but not over tightened the lid?  The o-ring seal on the cap does need to be taken off occasionally to clean underneath as it will trap coffee build up over time.  The screw top is what makes it so leak proof.  I suppose that, if you never clean the threads, the build up could get so bad it would leak.  That is not a design or product flaw - that is the nature of fluids.
4411256
I think it's great.  It rarely leaks.  It only leaks if you fill the bottle into the area where the cap will go into.  If you don't go up that high, then it is difficult to get it to leak.  I try no to let the bottle be sideways or upside in my bag.  Sometimes that happens anyway.  So, on those occasions, it leaks only a little.  Very little.  I only feel a little moisture in my bag.  I have never gotten a puddle.
I like that only stainless is touching my water.
I have had them for years.  Use them every day, and they have never rusted.
I prefer them to the plastic caps.
177495
IT HASN'T LEAKED.

This is all I want to put in my review. Like, every single coffee cup I buy seems to leak two days after I buy it.

Maybe this will leak in a few months... but as it is, it's worth it to just have a non-leaky mug for a month! Looks way nicer than my ancient mug (that doesn't leak, but just looks awful and I keep searching for a replacement), too.
1434289
I have bought a ton of different sippy cups for my son and this is the first one that truly DOES NOT LEAK!!
406041
I just got mine this last week. It's great. The high points of it are:

1) Great ability to keep drinks cold.

2) Fits in a tote bag, cup holder.

3) Easy to drink out of with out blocking your view of the road ( while walking) or having to open the cup up to drink out of.

4) For once no spill means NO SPILL!!!

The things that I don't like:

NOTHING!! This thing rocks! I will probaly get a bigger one for me and some more of this size for the kids for the summer. But honestly if you want something that will help you increase the fluids while monitering them this water bottle is really great.
1083205
No leakage ... easy to put together ... easy to load and unload ... probably the best deck box I have had .. and we have had other brands. This one does "not" leak at all!
4410295
This is hands down the best water bottle I've ever used, and I've been through a lot of water bottles. It's light weight, easy to carry, and easily fits in a backpack, purse, or cup holder. Best of all.... it doesn't leak!!! I've used mine daily for months and the seal it still as tight as the day I got it. I also like the lid design, a big opening for washing and adding ice and a small mouth piece for drinking.
4072561
It does not LEAK!!! When you release the trigger, the glue stops coming out. No extra glue means no mess. When I got ready to put glue down and move to next part, (was making flower basket), I didn't have to swipe end of glue gun to clean off and set glue gun inside cup to catch weeping glue.  Gets hot faster, glue goes exactly where needed, and stops when you want it to. Three excellent reasons to make this a five str purchase!!
535499
I bought this based off how many other people bought it and I must stay they are amazing!!!! Soft top side, soft rubber like material on the face down side (touching bed) and completely waterproof!!! I place a bit of the sheet over a bucket and poured a cup of water on it. It didn't soak through at all! I'm totally impressed and would recomend to anyone!!