Kleen Kanteen is my fave brand for liquid drinks! I've got the non insulated 500ml bottle as a birthday gift years ago, changed the cap to a stainless steel one last year, and it is still going good. At the recent sales, I picked up the sippy cup, I call it the sippy cup but it is the 437ml tumbler with straw, when I heard the news that single use plastics were banned. Drinks stay cold and refreshing for the whole day. Even ice cubes don't melt as fast. Perfect for our extreme hot summers.

I would have given five stars with the exception of two small dislikes. I did not like the straw. I would rather have a longer straw with a smaller/shorter silicone end, and I would have preferred the straw to be slimmer. No matter though, as I had my own on hand and simply switched it out with that. Second dislike, the size says 20oz, but I feel as though it might be a bit misleading. If you fill the cup to the brim, you are unable to put the lid on as it will cause the cup to overflow, or gush up geyser like through the straw opening. So, without the lid, yes to 20oz. With the lid, probably 17-18oz or so. Overall, it's a great size for my morning ice coffee and keeps it cold for as long as it takes me to drink it. A quick rinse and it works as a perfect water cup to refill and keep me hydrated all day.

I love my new insulated tumblers! I was hesitant to purchase, based off of negative reviews on the lid. But I couldn't find anything else similar in quality and design, so when the super bowl sale happened, I went ahead and bought it. I really love this cup. It's true, the lid is not designed the best, but it has features I like (ability to take it apart completely for cleaning, straw hole, and easy to open and close, take off and put on). The biggest design flaw in my mind is the size of the sipping opening. It's way too big. I've spilled coffee on myself twice due to the size of it... And I'm not a toddler. It's simply too big. Any jostling while drinking can produce spills this way (i currently live in Mexico where the roads are not always smooth). I've only had it spill once while the lid was in the closed position and in the cup holder. Obviously, this is not ideal either, but it's not as big an issue as the too large drink opening. I'm hoping the excellent designers at Klean Kanteen can remedy these issues so it can be the ultimate travel mug!

I've been using my brushed stainless steel insulated pint cup at work for a few months now. I'm contemplating bringing my coffee mug home. I bought it with the silicon lid. I'd suggest that you do the same too. It's not completely spill proof but it helps and keeps contents hotter (or cooler) longer. And if out of doors, I'd suppose it keeps "things" out of your container too. I like the fact that the lid can be separated for cleaning. The cup itself is well made. It fits in your hand like a pint glass. Cleans easily and is cool on the lips when drinking hot liquids, which kind of surprised me.
No complaints. Fits in my car's cup holder well too.
I ordered 7 cups in all colors and 3 in brushed stainless. When I hand them out on Christmas I expect the usual swaps and attempted swaps between family members for their "favorite color", which I don't have a clue about yet. Some other vibrant colors would be nice too. Like Red, Royal blue, Purple (my niece loves Purple.)
My brother is getting the black, it looks like a full pint of Guinness. ;-)