No gentle handling required here. The Duluth Trading Packable Pint Glass squeezes into a pocket, then pops back into shape to hold your preferred potable. Flexible, durable food-grade silicone withstands temperatures from -72° to a blistering 650°F. Insulates too, so it won't sweat when it's filled with a cold libation or burn your paw with a hot one. FDA-approved, BPA-free food grade silicone won't ever break, crack, chip, fade or scratch. And don't hesitate to run it through the dishwasher or leave it in the freezer. It's all in a day's work for this pint-sized wonder. Holds 16-oz. to satisfy a really big thirst.