Yellow compressed air powder cannons use no pyrotechnics or Tannerite. The “pop” they make is due to the release of compressed air-- much like a champagne cork popping. However, there is enough compressed air in the 2x16” canister to shoot the powder up to 15 feet in the air, so it’s a lot of fun and makes for great pictures! To deploy, users simply hold it with one hand while pointing upward and twist the bottom with the other hand to release the yellow powder.