A:Answer Honestly the tumbler itself does whole hot stuff for at lease 6-7 hours. I totally forgot I had coffee in my backpack and when I opened my tumbler when I got off work, it was still pretty hot. The only bad thing is Otterbox claims the lids is “leakproof”, which in case, it’s not! So now I just use it as a thermos.
If you don’t mind spending the money, I recommend getting the Takeya 30 oz tumbler. This one is solid. Holds the liquid temperature and is leakproof.
https://www.bestbuy.com/site/takeya-actives-31-3-oz-thermal-cup-arctic/5981125.p?skuId=5981125