This pet bowl opens into a watertight pet bowl in seconds! It has a storage pouch that it comes in. Take it out of the pouch, twist it to open, re-twist to flatten it back down. It is space saving, watertight, lightweight yet durable. It is pet safe and made with an EVA liner. The large size holds approx. 1 gallon, and the small holds approx 1.6 quarts. Great for travel or gift giving. Perfect for taking the dog to the park, hiking, camping, etc.