Double Waterproof, Easy to Use: The lid's silicone seal and lock button ensure that no water leaks 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 the sink and seal the spout switch so you don't have to worry about getting your backpack wet Large Foldable Sink at 180 Degrees and Large Capacity of 300ml: the Sink of The pet water bottle is 120mm long and 75mm wide, which allows your dog to drink better. 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, eco-friendly and non-toxic (Note: It is normal for new cups to smell bad, wash them in cold water before using). The internal activated carbon filter is used to purify 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's best to use your hands to wash the water cup. You can contact us by email if you have any questions