It holds 13.5 ounces and is made of BPA-free stainless steel, durable enough for kids to take anywhere they want. The comfortable silicone spout has a cover to keep it clean and help protect from germs, which opens at the push of a button but will not leak when it is closed and locked. Double-wall insulation helps retain the temperature of the beverage and prevents condensation from forming on the outside, eliminating messy water rings. The kids water bottle can be tossed into a bag for worry-free travel; it also fits in most car cup holders and has a built-in carry handle, which folds down out of the way when it is not in use. Hand washing is recommended; do not microwave.