This is a black PET bottle cover. It's sized to hold one 500ml PET bottle. There are two side-release buckles on the sides, and you can use it in two ways by changing the position of the buckles. It's convenient for carrying or attaching to a bag. 【Color】Black 【Size】Compatible with 500ml PET bottles 【Specifications】2WAY / With buckles 【Condition】Unused It's lightweight and easy to use, perfect for carrying water when you're out and about. Please consider it.