I have this tumbler in both 40 Oz and 32 now and absolutely love them. I bought the 32 for myself and my husband. We WFH a fair bit and have always struggled with hydration. These have been the absolute best for not only travel, but as a good reminder to drink my water. I use mine in an infrared sauna regularly and have no problems with the liquid staying cold or the straw being compromised or breaking down (I keep it close to the door - coolest spot in the sauna as safeguard).
[This review was collected as part of a promotion.] I love this cup! It fits in a cupholder, and the flexible straw really separates it from competing brands. I like that its not HUGE, some of the larger ones are hard to carry.