Elon Musk had begun selling Boring Company hats in 2017 as a fundraising and marketing technique. The first 50,000 purchasers of the hats would be given tours of the Boring Company's tunnel digging machine and would be allowed to operate it during said tour. Initially in jest, Elon touted the idea of selling Flamethrowers following the hat sale. 
The deliveries would begin in Spring of 2018. They are marketed as relatively safe flamethrowers. Only 20,000 flamethrowers will be sold, with thousands selling upon release.