Klean Kanteen 20oz Double Wall Vacuum Insulated Stainless Steel Tumbler with Leak-Proof Lid - Keeps Drinks Hot/Cold for Hours - Perfect for Coffee, Tea, Hiking, Camping & Office Use

My first Klean Kanteen 8 ounce tumbler was purchased several years ago as a camping tumbler for whiskey based on a review in Outside magazine on whiskey tumblers. I had been gifted a 10 ounce Yeti Tumbler which functioned well for that purpose but left me with significant hand fatigue after a few Old Fashioneds. My friends with larger than normal hands echoed this complaint about what we considered an outstanding product.As a whiskey tumbler, I found it outstanding with similar insulating properties to the Yeti but significantly more aesthetically pleasing and a joy to hold. 8 ounces is an ideal size for portion control, which is an important consideration in a whiskey tumbler.Numerous people have complained about not being able to drain the tumbler easily with the lid on and that effect is real but it is a small amount of the contents and what can you expect for an insulated tumbler with thick walls?The insulation is excellent with no sweating on the outside and a wall temperature very near ambient. It is worth the purchase price for this application alone even if used for 2 or 3 camping weekends a year. It will survive drops with ease, but I do suggest hand washing with no appreciable soaking time as I would with any glued vacuum insulated container (which nearly all manufactured today are). As a camping whiskey tumbler I would give it a 9.5 out of tenThere are several reviews singing the praises of this tumbler for 8 ounce coffee drinks from a national coffee chain. Excellent insulation, fits in cup holder, adequate lid. An important note would be that I advise against filling to the brim and placing in your cup holder -- a jostle will result in spilled coffee...I bought this as an important splurge to enhance my camping experiences but I have come to use this tumbler as my go to coffee cup at home, at work, and camping so it gets plenty of use. It functions great ....and I said this before, but: It is a joy to hold.It is not the ideal sized coffee container for a lot of people but it works very well for my coffee preferences. It pairs very well with the aero press coffee system which I use at home and camping. If I start traveling for work again I will carry this tumbler and my aero press so that I can have coffee that kicks hotel coffee in the butt and is personally preferable to coffee from that national chain -- at a fraction of the price