What's The Features for DEYACE 2 in 1 Dog Water Bottle? 2 IN 1 design, half of water and half of foods. One-key release/lock water. Key Lock Leak Proof Design. One hand operation, convenient to use. Food grade material, BPA free. Compact size, reasonable capacity. Safe and durable, easy dismantling and cleaning. No waste. Return the unused water back to the bottle and reuse. Fashion Appearance, wide sink allows your dog easy to drink water. Perfect for taking your dog outdoor walking, hiking, traveling etc. Please note Keep the puppy dog water bottle out of hot water over 176℉/80℃. Don’t wash with dish-washing machine. Don’t press water key hard when lock key is locking. Don’t put these in the cup: dry ice, chocolate, soda water, milk etc. How to use 1. Remove the grain cup, turn the lock button to the left and press the water supply button, the water will come out. 2. For the leftover water, raise the water supply port and press the water supply button, and the water will return from the water supply port to the bottle. 3. Open the grain cup, pour the grain into the trough, cover the grain cup when the pet has finished eating the grain, put the food cup back in place. 4. You can put the bottle in the bag with the lock button on the right.