An aerosol dispenser (20) is made from materials which can go into a single recycling stream having a single class of materials, as defined by the Society of the Plastics Industry, and particularly may exclusively comprise Class 1 materials suitable for heating in a microwave oven (60). Consumer products, such as food, contained in the aerosol dispenser (20) may be heated in a microwave oven (60) prior to dispensing. Upon dispensing, the food retains residual heat, and is suitable for eating or further cooking. Other heated products in the aerosol dispenser (20) may be comfortably applied to the skin, used as air freshener, used for cleaning, etc. The aerosol dispenser (20) has a safety valve (50), to safely relieve product (42) and/or propellant (40) pressure upon overpressurization in a microwave oven (60). The safety valve (50) may be single use or reusable.