Purchased for a day at Sea World. Despite being black, living in the stroller's console cup holder, 100F heat, and being refilled with bottle water 4-5 times, it kept ice for 6 hours.We typically use the “Coldest Water Bottle” brand but I'm very happy with the HydroFlask. The Coldest Water Bottle (1 gallon size) did keep ice and rum punch cold for 48 hours in the Texas sun so I'd say it has the edge but the Hydro Flask is absolutely perfect for Disney, boating, or Outside work where you need something to be reliably cold for 6-8 hours.
Rating:
[5 of 5 Stars!]