The restrictions behind mailing/UPS/FedEx is also why canister fuel is so hard to get now unless you buy it from a store in person. It comes down to liability and licenses – of which most of us don't have. And more so Esbit is a FUEL and fuel is banned to be shipped by the average folk. It isn't legal, no matter what anyone wants to argue if you are a person walking in and mailing a box of it. Did you all know that is also illegal to ship via USPS alcohol? Yep! It is required as well that if you ship in even an empty booze box you cover up all logos!
The Post Office has huge posters in the buildings telling you what cannot be shipped. Go look at it sometime…..or here is the boring list from the PO's website:
Many household items can’t go in the mail.
Hazardous materials come in a wide variety of forms and can be chemical, biological, radioactive, or a combination.
The Postal Service'sâ„¢ definition of a hazardous material includes many common household and consumer products. They may not be dangerous on your shelf at home, but they can become a hazard when shaken or when the temperature or pressure changes.
Some common hazardous materials include…
Perfumes
Nail polish
Flea collars or flea sprays
Aerosols
Bleach
Pool chemicals
Paints
Matches
Batteries
Fuels or gasoline
Airbags
Dry ice
Mercury thermometers
Cleaning supplies
Items previously containing fuel
Glues
Fireworks
Not sure if what you’re sending is hazardous or prohibited?
Just call 1-800-ASK-USPS or your local Post Office.
PS: When I ship alchy stoves out of the US I cover up the logo on the boxes. Causes way less issues with the customs. And folks? People do actually inspect the mail, mostly due to the rampant abuse of Media Mail…..