With a 40-ounce capacity, this reusable tumbler is the drinkware everyone needs in their pantry. Double wall insulation and double wall lid keeps liquid hot and cold longer. This tumbler kept beverages cold for nine hours (longer than any other vessel we tested). And its straw lid creates a tight seal that prevents most leaks.… Continue reading Owala Vs Stanley: The Differences Between These 2 Viral Tumblers