This fun straw tumbler will keep kids hydrated without any fuss! You can prevent messes and spills with a cup that won't leak: the soft and comfortable silicone straw has a valve that allows easy access to water, but won't drip when the tumbler is tipped over. You can also forget about leaving water rings, since vacuum insulation will prevent condensation from forming on the outside of the cup, in addition to keeping drinks cold. The 18-ounce tumbler fits in most car cup holders and the handle makes it easy to carry around for drinking water on the go. Plus, it's made of durable stainless steel with a lid that's easy to disassemble and clean in the top rack of the dishwasher. Perfect for everyday use, this tumbler features Marvel's Spider-Man artwork to make hydration fun.