[Color & Size]: Blue, 19oz (550ml), suitable for large dogs or for long walks such as hiking or traveling. [Function]: Designed with a silica gel seal ring to efficiently prevent water leakage. One-key lock ensures water does not leak. Leak-proof guaranteed. Can be placed in a backpack without worry. [Convenient to Carry]: Compact design with ample capacity, ideal for pets during outdoor walking, running, hiking, traveling, or playing. Fits easily in a backpack or can be carried with the sling rope. [Easy to Use]: One-key open and lock function allows one-hand operation. Press the water key to dispense water, release to stop. Unused water returns to the container easily. [Safe & Durable Materials]: Made from high-quality, lead-free, BPA-free materials. Safe, durable, and easy to disassemble and clean. Enjoy safe and enjoyable outdoor activities with your pet.