SIZE: The tumblers are 2.94 by 3.87 inches wide and 5.72 inches tall, with a capacity of 10 ounces. MATERIAL: The durable tumblers are made of plastic with silicone spouts. They're dishwasher safe, can be disassembled for easy cleaning, and should not be microwaved. LEAK-PROOF DESIGN: The silicone straws have built-in valves that allow liquid to flow when drinking and prevent accidental spills when the tumbler is tipped over. The straws are also soft and comfortable for kids to drink from. AT HOME OR ON THE GO: The straw tumblers are suited for travel, since they have handle, fit in car cup holders, and won't leak while keeping drinks easily accessible. They're also great for drinking beverages at home without worrying about stains or nearby electronics. LIFESTYLE: Zak Designs drinkware makes hydration fun! These tumblers are a great gift for Peppa Pig fans, as well as fully reusable--no more disposable cups--and a fun addition to the daily routine.