In keeping with air cargo regulations we cannot ship hazardous materials.
The Department of Transportation (DOT) restricts air shipment of certain items that could contribute to an on-board fire or other hazard. These include aerosols or products with flammable chemicals that have potential to explode in flight, such as rubbing alcohol, nail polish or nail polish remover, products or medications in pressurized spray cans, such as hairspray, shaving cream, and inhalers.
Products that contain flammable, volatile, or corrosive chemicals, such as fragrances and perfumes.
Some examples of commonly-used items restricted or considered hazardous under USPS regulations include:
Flea collars or flea sprays
Fuels or gasoline
Items previously containing fuel