How are WPC outdoor trash cans designed to accommodate different bag sizes and types?

WPC (Wood-Plastic Composite) outdoor trash cans are engineered for practical functionality, with a key focus on accommodating a wide range of trash bag sizes and types. The primary design feature is an adjustable or flexible bag retention system. Unlike fixed lips on some metal cans, many WPC models incorporate a sprung or sliding ring inside the can. This ring can be pushed down to secure the top of smaller bags, preventing them from falling into the receptacle, or pulled up to create tension for larger bags, ensuring a snug fit around the entire rim. The interior geometry is also crucial. WPC trash cans typically feature smooth, regular-shaped interiors without sharp protrusions. This design prevents bags from snagging and tearing, making them compatible with both standard low-density polyethylene kitchen bags and more robust, heavy-duty liners. Furthermore, the inherent rigidity of the WPC material provides a stable structure that holds the bag open without collapsing, facilitating easy disposal. This thoughtful combination of an adjustable retention mechanism and a smooth, sturdy interior ensures that these durable outdoor bins can reliably and securely use whatever bag is most convenient or appropriate for the specific setting.