The automatic model is sensor controlled and has a lid which quickly opens when the trash bag gets about 10 inches and 130 degree angles from the can's sensor. With normal usage, the power will last about 6 months with 4 D-size batteries. For those that do not require trash bags, the inner bucket can be easily removed and cleaned when the trash is removed and taken out.
The plastic trash can has been around for a long time, but not the automatic types you can get today. There are many durable plastic models on the market, fitting in any room in the home or office.