This one-of-a-kind, OPW Camouflage, 12 oz. Tumbler, is unbreakable, bendable and sturdy. 100% safe, highly portable, uniquely fun & a great gift for anyone in your family! Take it anywhere and challenge it to the extremes! Microwave safe, Dishwasher safe, Freezer safe, Oven safe. Silipints have twice the insulation value as glass, so not only do hot drinks stay hotter and cold drinks stay colder, it's also great for boiling water, or refreezing smoothies and ice cream! Silipints are made from the same 100% food grade silicone that make baby bottle nipples, so have no fear of BPA toxins or off-gassing.