Spill proof lid should have been included!
358409
Everything about this cup is pretty awesome. Except the lid. I HATE the lid. Why even bother manufacturing this cup with that POS lid that will leak if it is full and in your car. It leaks in my lunchbox as I am walking. I don't want to fill it a third full to avoid leaking. I want it full and I want it not to leak. Charge $2 more and include the spill proof lid. I shouldn't have to buy it separately. It really grinds my gears that this is not included!!!
1214949
Hard for my kids to get water out with the rubber piece so I had to remove it, but then it's not spill proof. There should also be a lid or cover for the mouth piece.. not worth the  $$
3575780
I didn't realize the drinking part was a wide opening.  Bought for kids, was hoping it would be spill proof.
2412246
Works as expected.  Try to get one with an anti-spill lid, though.
2411421
I bought these for my kids to have drinks in a bottle which opens easily but also is spill proof. We had one at home and I really loved it it spilled maybe one or two times and it was always when we forgot to lock the lid. So, my recommendation is to lock your lid always. Love the colors and the mechanism. Ever since we bought this set we tend to get bag wet. I am not sure what it causes as when I try to shake the bottles upside down no water comes out. Leaves me baffled. So we try to have the bottles in upright position. Wanted to buy another set but not sure now.
617137
This product would be great if the lids snapped in place. if your looking for this product because it has a lid, beware you could find your food spilled in your bag or lunch bag. :-(.
1731940
we have a couple of these, they are pretty much spill proof! when the baby sucks on it only then does liquid come out. I recommend a couple of these, for water and another for juices.
4269304
Not spill proof.  Only buy it if it can live in your cup holder/on your desk.  I've tried two of these mugs, so I don't think they both  happened to be defective -- if you toss this mug in your messenger bag, it will leak on everything.  It's not like the lid come off and liquid gushes, but liquid will seep out of the top until your psychology textbook can no longer be resold at the end of the semester.  Trust me.
2819738
Bottle is sturdy and the mouth is the same size as a traditional wide mouth Nalgene, but fits in a standard cup holder.  The flip lid it came with is a bit complicated, and while it is easy to use for on the go drinking, it seems to me that it only offers space for germs and dirt to get stuck.  I prefer a standard lid. Thankfully the traditonal Nalgene lid fits...I only wish there was a flange for the lid keeper strap to hook behind.
4646005
First of all, I'd like to say annoying it is when people leave 2 or 3 stars when complaining about shipping issues or damaged items upon receipt, which have nothing to do with the product itself (there should be a section where you can rate shipping/handling/packaging or complain to Amazon itself since ~90% of items are shipped from Amazon's fulfillment center) - DUH!  So the rest of use who are actually interested in the "product review" don't have to sort through the population's shipping/handling complaints or preferences about an item being dishwasher safe when it never even claimed to have such a feature!

I used this thermos 10yrs ago (stainless steel basic version, no color and slightly different pour spout) when in college and it tumbled around in my backpack all day during those winter classes and never leaked once.  I was pretty shocked at the quality.  It was lost during all the college moving and have yet to be able to find this again UNTIL NOW!  This version is EVEN COOLER because of the poor spout that doesn't limit you to pour only out of one opening, but instead more like a lava flow!

To those 2 out of 16 reviews to date, I would say that the reason your thermos has leaked is because you have not checked if the rubber seal is indeed properly in place.  This poor spout seal is the same idea as the OXO airtight tupperware that is so popular these days... LEAK PROOF... PROVIDED YOU HAVE THE RUBBER SEAL POSITIONED PROPERLY.  This can easily be moved out of place during cleaning (which one should be removing anyway to ensure that the cap is properly cleaned and then aired out to dry).  It is just as easily put back.  Please check this KEY to SEALING AND LEAK-PROOF feature before rating it down for your mis-use of the product.

My preference issue here is that the green thermos comes with a fancy yellow interior color whose outline cannot be seen in the picture (would have been nice to know before purchasing because it does give an entirely different look to the thermos, but I'm okay with it).  Stainless steel no color version comes with black interior of lid from my recollection.  I wonder what the interior colors to the blue and red are since those aren't visible either. Much better than the Nissan thermoses with that un-proportional imitation of this bullet shape that also has an ugly egotistical bold black block letter font Nissan Logo front and center (not displayed on any images by the way so you don't see it until you buy it!

One and only true complaint for an upgraded version: that the cup is not also stainless steel.  And the product does not say BPA Free so I hesitate to use the cup if I have other options available.  Would definitely recommend to anyone!
3555247
the can itself is great but i would have wanted the lid for it. apparently it is sold separately.
3813131
The lid does not actually "attach" to this jar, it just sits on top of the jar.  If anyone was to pick this up or tilt it by the lid, it could be a big spill mess!
1960522
The title says it all. I got one from Amazon. The lid fits perfectly. I bought one at Target, same brand and size, and the lid is too loose and caused quite a spill. We're used to it now, but be aware if you buy multiples, the lids may not fit the same.
4788171
Everything about this is excellent.. the size, the quality, etc. Only complaint that really bothers me is that even though there a slidey thing to cover the opening, it does stay latched or close and so my smoothies keep spilling in my bag no matter how careful I am and that happens 8 out of 10 times I use it. Pretty annoying. I hope they make a lid for this in the future that actually seals and is spill proof.
3658062
It doesn't spill because the lid is close to IMPOSSIBLE to remove. Once removed, the lid is a fairly difficult to disassemble, clean and reassemble. There are videos on YouTube showing how to clean the lid. That big gasket is pesky! Please watch the video posted next to the product photo to see how the lid is taken apart (thanks Thermos). For $28, it it pretty expensive tumbler, since Thermos does not sell replacement gaskets for this item.  Heck, I'd even buy a whole new lid assembly! I'd give 5 stars if I could find a replacement lid/gasket.
3001107
SPLASH PROOF not SPILL PROOF..  this is just OK..  If you turn your cup over..  your drink will spill.  This lid is not SPILL PROOF.  It does allow for covering the tumbler and closing the lid so bugs don't get in..  I got a discount so it's almost worth what I paid for it. Wouldn't buy again.
2806617
Quality product if not for the fact that the lid leaks. An unfortunate deal breaker!