In total I had 6 of their double wall vacuum insulated thermoses, ranging in size from the 10oz Tumbler up to the 32oz Tumbler. All in all, both mugs do an incredible job at insulating both hot and cold drinks for hours on end. Additionally, when holding each tumbler, I couldn’t feel any heat or… Continue reading USA Ozark Trail Double-Wall, Vacuum-Sealed Tumbler Stainless Steel 20oz 590ml