1.Super Simple to Use:unlike other carabiner type,our dog poop bag dispenser equiped with elastic band, sturdy and easy to load.2. Screw to Close:the lid screws on the dog poop bag holder,easy for the bags to dispense,easy to open and close,makes walking the dog much more convenient.3.Light Weight Pet Poop Bag Carrier: made of high quality plastic,light weight and durable,easy to change bags,ideal for walking, running,hiking.4. Universal Fits: these pet waste bag holders fits all standard dog poop bag rolls,the large windows allows you to rotate the bag roll easily.Handy and portable to use.5.Included: only come with 2 Pack holders (the poop bags are not included),including light blue and purple poop bag dispensers.