Hogg Tumbler Stainless Steel 30 oz.

This is by far the worst brand of insulated tumbler i have ever used. I received one as a gift that was decorated with the glitter / acrylic design on the outside, which shouldn't effect the function of the cup. I had the cup filled over half full with ice and added regular tap water (not warm at all) and within 30 minutes all of the ice was melted. And this was while the cup was inside and not even outside in the summer heat. Other brands of similar tumblers will keep ice for HOURS, even in the hot sun.