This set contains two reusable water bottles with fun artwork that will give your kids a reason to carry water with them. One bottle is stainless steel with a 15.5-ounce capacity, while the other is made of plastic with a 16-ounce capacity; both materials are durable and capable of standing up to everyday wear. The lids have built-in carrying loops, covers to keep the silicone spouts clean, and an easy-to-operate push-button release. Everything is completely BPA free and can be washed in the top rack of the dishwasher. Do not microwave.