lid burps like a baby
591551
I have used Contigo mugs exclusively since they first came on the market because there is nothing else that seals like they do AND keeps the coffee hot for hours.  This newest revision keeps the coffee hotter than the previous one.  But now I have a problem that is a serious issue.  The lid has a spring mechanism that keeps the lid shut.  It works fine if you drink directly from the tumbler, but I like to pour my coffee into a ceramic mug and drink it from there when I am not on the road. Unfortunately, when you pour the coffee, it has to flow through this area and it is not accessible to wash.  Over time the coffee builds up on the spring causing it to get sticky. (Like sticky valves in a car engine.  I have tried soaking the lid overnight in plain water but unfortunately it doesn't get completely clean.  If you soak it in soapy water, be prepared to have your coffee tasting like soap the next time!  Now each time I pour out a little coffee into my ceramic mug, the spring snaps back and squirts the coffee across my desk - computer keyboard, papers, EVERYTHING - up to two feet!  For this reason, I have to give this tumbler a one star rating.
3373851
It takes about 40 pumps to get the belly to pop.  You can't even tell that the belly is expanding.  My kids saw a commercial for it and really wanted it for Christmas.  I am returning it today.  Don't bother with this one!
2647055
Seriously disappointed in this product. The lid doesn't close well- it doesn't even feel closed. Therefore I can't send it to school because it will leak all over everything in the book bag. Keep looking!
3132229
Im disappointed in this product.  It is a lovely jar but the lid design is just awful.  There is a small lip on the bottom of the lid but there is nothing on the top of the jar to hold it in place.  In other words, when you put the lid on the jar it slides too easily across the top and falls off. I have no idea who designed this but it was an extreme fail.  They needed to have some type of ridge to secure the top to the jar.  This would not be recommended for a home with kids; I guarantee it will be broken in no time.
4260673
Like everyone else has elaborated on, the lid is damn near impossible to attach. I'm not going to spend hours looking at YouTube videos on attaching a trash can lid, it's anything but simple for a brand labeled as 'simple human.'

Another thing, the can itself leaks through the wheels. You need to buy some damn solid bags if you plan to purchase this trash can especially if you live in an apartment without access to a hose as any attempt to spray clean the interior of the trash can will result in a floor that must be mopped if only for sanitations sake.

I'm probably just going to throw this out and get a push lid can from Walmart, after about an hour of the trying to put the lid on, even using a hammer, no dice. The lid remained In a closet.

In conclusion, save your money on this one. Burned by the 4.5 star rating--learn from my mistakes.
1622573
I was super happy when it arrived early, I built it immediately. I was saddened that the product came with a warped lid. It doesn't sit and close true to form as my other Weber grills do. It closes but without an airtight seal. Very disappointed!!! Considering a return on this item. I think I may have just gotten a bad one from the factory. I love my other Weber grills.
4313672
After literally ONE use, the salad dressing container no longer will stay closed.  Salad dressing leaks all over whenever I try to use it.  The flaw is that the lid to the salad dressing container is made of flimsy plastic and seems to have warped slightly after my first use.  There is no plastic membrane to secure the lid.  Very poor design for something that is supposed to hold liquid.  In addition, the clear plastic lid that covers the fork pops off all the time which is annoying.  Very frustrating, given all of the positive reviews.  I am sending it back and am going to try a different brand.
651446
I used to use this when it was a combination of L-ascorbic acid and ascorbyl 2-glucoside (AA2G). Ever since they changed it to 20% ascorbic acid, the product seems to contain gas inside and is frothy. Upon first opening the bottlle,  air or gas escpaed (making a burping sound) and of course some of the product also burps out of the little bottle and so you have just lost some product. It only happens the first time you open the product.  I complaind to Obagi but they seemed like they didn't own the issue and told me to speak to the vendor of the product. New bottle...same thing.
3331363
I wouldn't care if this was an album of recorded burps and farts - the cover is amazing. That seals the deal for me. They should make posters of that image. There's no nudity, yet it's so visually jarring I nearly choked on what I was drinking the first time I saw it. Whoever conceived and took that photo has to be eliblgibe for some kind of award....anything. Never in my life have I looked at an album cover with more determination and said to myself "I MUST hear what this sounds like...I simply must..."

Believe it or not, the music isn't bad either...
1485912
My girlfriend got one of these a few weeks ago and loved it. It keeps hot things hot and cold things cold just as advertised, so I decided to get one for myself. Mine appeared to be exactly the same but the straw lid is awful! It won't keep a consistent seal with the straw so most times I just get a little water with lots of air bubbles. I even switched out the internal straw with the spare that came with it and it has the same issue. It's frustrating to drink from and it's so loud from the air bubbles I keep getting looks from people. Also, I'm assuming because the seal isn't as strong, it doesn't keep things nearly as cold/hot as my girlfriends does. I'm SUPER disappointed.  :(
2787826
I don't often write negative reviews as I figure maybe it's a "me" thing. In this case it is not. This thing is a child sized toy can. Just like others stated, the lid is loose fitting so coals will smolder instead of be extinguished, and no way is it keeping moisture out if your store dry charcoal in it. . As someone else mentioned, no way is 15 lbs. of charcoal going in this thing unless it is dust. Stay away and buy a full sized can with a good lid.
4656705
The lid was too loose. Not air tight. I have the older F1B 2.5 liter model.  Cost too much to send back.
2583220
The lid doesn't like to stay on. As long as its used to not travel it's fine. Or put a rubber band around to keep it closed
2546486
Sadly, the lids are very problematic as only the ones with the circles can snap shut. I would have returned them, but I work full time and go to grad school. I actually secure them with rubber bands when I pack my lunches.
2345933
I bought a replacement lid for my daughters cup after losing the first flow stopper in my dishwasher.  I am disappointed to say that upon receiving the second lid I found the stoppers to be quite loose.  They do not stay in place.  One pound of the cup on the table and my daughter jolts the stoppers out and then milk, juice or whatever is in the cup flies all over.  My first lid worked wonderfully though, I think I just got a dud but for 2 bucks I'll get another lid as soon as I'm sick of cleaning up messes.

The design of the cup and lid a great for little kids and very rugged I like the little space left on the lid loops for little noses.
3973557
I'm really surprised for a kids cup the design flaws in this bottle. I don't know if we received a defective bottle but the lid takes a tremendous amount of force to close and the metal latch also takes significant effort to lock. My 2.5 year old needs both thumbs to open the lid. Although I could open the lid without too much force closing the lid takes effort. Additionally, the lid design is not well balanced for the 12 oz bottle. The bottle tips over very easily if it's not full. Although we love the narrow mouth, it's just not suitable as a kids bottle. We'll be trying other bottles.
2712329
I really wanted to love these container as I have invested in nice selection of them.  After owning them for a year now, I can honestly say I'm not sure I would buy any more.  I read the customer reviews that stated the lids are difficult to get on and off, but several brands had this problem so I went ahead and purchased these.  Today I had my fill!! The lids on over half of the containers are so difficult to use it makes me hesitate to use them at all.  I'm fed up.  Please be well aware that the lids are SUCH an issue.  I am strong, but I call Uncle.