My All Is Furry And Bright tumbler is 20oz and doubled-walled stainless steel.
So you can't put it in the dishwasher, but it's crazy-easy to clean (and I hate hand-washing dishes, haha!) *and* it does not leave a ring nor need a coaster, and keeps ice in your drink through family game-night! Also slightly bottom-weighted so not "tippy" or prone to being bumped over (at family game-night!). Plus it's super-cute! Mine holds about 20 oz.
I love to use this tumbler. I also love to stare at it!!
We love all of our Teddy stuff!