It's a package of Exotic Firearms 37mm rockets and casings! Anyone got a good caption for this one? :) 

Exotic Firearms 37mm loading rockets and casings. Our 37mm Rocket Flare Construction Kit contains five 37mm rocket flare projectiles with five rocket lids, five 37mm powder bushings, a disc insert pack, colored stars for the payload, and instructions. Load your 37mm launcher today!