Double Waterproof, Easy to Use: The silicone seal of the lid and the lock button ensure that no water leakage will occur. Easy to use, the button on the right, then press the button to apply pressure to control the amount of water and feed your pet in one second. After use, simply fold up the sink and seal the spout switch so you don't have to worry about getting your backpack wet Large 180 Degree Foldable Sink and 300ml Large Capacity: The pet water bottle sink is 120mm long and 75mm wide, which allows your dog to drink better. Compact size 3.04 x 3.04 x 5.26 inches (W x H x L), 300ml water capacity, the water tank is designed to fold 180 deg Food Grade Material and Activated Carbon Cartridge to Protect Your Dog: The pet water bottle is made of food grade material, tough and durable, environmentally friendly and non-toxic (Note: It is normal for new cups to smell bad , wash them in cold water before using them). The internal activated carbon filter is used to purify the water and provide your dog with a clean water source Easy to Carry and Solve Your Pet's Water Problem: Equipped with a Detachable lanyard, you can hang the water bottle on your wrist or backpack when you are on the go. With the dog water bottle, you can be sure that your pet will never go thirsty as it provides clean water anytime, anywhere. A water bottle is the answer to your pet's water problems Note: It is not recommended to fill the bottle with hot water and wash it in the dishwasher. Make sure the cap is tight and folded before placing it in the backpack. At the beginning of use, pets can be enticed to use this water bottle with treats. It is best to use your hands to wash the water cup. Friendly Tips? It is not recommended to fill the water bottle with hot water and do not clean it in the dishwasher Make sure the lid is tight and folded before putting it in the box When the puppy has finished drinking and there is still water left in the glass tank, you can press the water outlet button, gently tilt the bottle, and then put the water back into the water outlet When you receive the new water cup, it is normal that it has a peculiar smell. You can clean it with detergent