Abstract: A platform is supported on uprights on a base and extends over the top of an open top waste receptacle arranged to be supported on the base. A can crushing compartment is supported on the platform and has a powered plunger arranged to crush cans in the compartment to a reduced size. The compartment in which the cans are crushed has a bottom opening which is of restricted size whereby to maintain cans in the compartment prior to crushing but which allows cans to fall by gravity into the waste receptacle after being crushed. Sealing structure is provided between the platform and the waste receptacle and also between a cover on the crushing compartment. Venting inlets and outlets are provided on the platform that admit fresh air and that carry away fumes from the waste receptacle.