Disposible Kodak 800
I imagine that disposable film cameras will eventually disappear from the market but for now they are available new and…well you cant really say used, but found at thrift stores with unexposed film. Kodak was very proud of its camera recycling program claiming that 76-100% of the camera components were reused or recycled. 
I’m not sure where that stands now with the bankruptcy and restructuring and the comparative collapse of the film market. I can’t see that the volume of disposable cameras still being used warrant a full separate recycling program.
You could say that as a photography tool a disposable camera is limiting but maybe that’s the appeal. You can let go about worrying about the camera or any false notion that your going to produce some technically superior image and just enjoy the act of photography. A disposable camera gives you permission to have fun.