I'm selling this because I bought it but don't use it. It's a convenient item for when you go out. It will be disassembled for shipping. It has a water tray attached to the bottle, so you just push it. Water comes out into the water tray, so you can give your pet water directly. You don't need a cup, so it doesn't get in the way when you carry it. It has a belt loop, so you can attach it to your belt. It holds the same amount of water as a 500ml plastic bottle.