My goal was to see how long I could keep a cup of coffee warm and if there would be variation in temperatures over time across the tumblers. I also used two of the 22oz Tumblers, one with the standard open mouth lid and one with a closed, spill proof lid. Double-wall insulated tumblers are all the rage and for good reason! They can keep drinks cold or hot for hours, which can truly be a lifesaver whether you’re on the road, in the car, at the office, or at home. The Ozark Trail cooler is made from polyethylene, which is the most common kind of plastic in use today. For anyone in the market for a cooler that works and won’t break the bank, I would absolutely take a serious look at what Ozark Trail has to offer. When it comes to the seal, I was again very impressed by this cooler. Cracking this thing open sounds like you are opening the airlock on a spaceship. Tumblers enable office workers to enjoy their beverages hot and cold. Unfortunately, like most all water bottles and tumblers, they are made in China. Ozark Trail tumblers are not dishwasher safe thus you will have to clean it the traditional way which is by hand washing. This brand is made with the same type of 18/8 food grade stainless steel as the Yeti, RTIC tumbler and Ozark Trail. With a price point below $10, you are able to get 4 of the 32oz Ozark Trail Tumblers for a price that is comparable to 1 of the competitions 30oz tumblers, which to me is a huge win. The Yeti Rambler tumbler is made with kitchen-grade stainless steel and has double-wall vacuum insulation. This allows hot drinks to stay hot and cold drinks to stay cold, and it’s “MagSlider Lid” helps prevent heat or cold from escaping but won’t entirely prevent spillage. It’s claims to be BPA-free and has a “no sweat” design, which keeps fingers dry. This is because Yeti coolers, tumblers, and mugs, and other products typically have a better construction quality and can keep beverages hot or cold for longer. After all, this brand is not a favorite of millions of outdoor enthusiasts all over the world for no reason. When they were first released, the only option was stainless steel. Now, to be more competitive with Yeti, they have a wide range of colors and styles. According to most user reviews, the Yeti Tumbler can keep hot coffee warm for five to six hours at room temperature. It is made with stainless steel with vacuum-insulated walls designed for regulating ambient liquid temperature. Although the Ozark Trail Tumbler is not dishwasher safe, it is very easy to clean by hand washing. The Tundra Haul features rubber clasps, which I really like, and hard plastic wheels. Pelican is a newer entry in to the world of rotomolded coolers and have taken their own spin on design and function. Overall the Pelican coolers have sharper edges and a bit more of an industrial feel than the competition. You can tell there is a serious seal established when you latch this shut. The Ozark Trail 45 Qt Rolling Thermocooler also comes with an internal tray, which the other two do not. This site started as my hommage to the Camino and has expanded to include all the outdoor activities I love - hiking and camping.