Each refill ring supports approximately 25 uses Designed for IntreLife self-sealing and self-changing trash can Easy to install and convenient to use Lasts 20-25 days per installation Sturdy and durable Steps to Replace the Refill Bag Ring: 1.Press the button to open the lid and lift the retaining ring from the top of the trash can. 2.Insert a new refill ring. 3.Put the retaining ring back. 4.Press and hold the button, and a new trash bag will automatically drop down.