This is a vintage Fire Extinguisher ACID BOTTLE WITH BRACKET. The acid bottle fit into the top of a 2 1/2 gallon Soda-Acid Type Fire Extinguisher. It had a lead stopper in the top and the bottle has an acid fill line marked on the side. When the extinguisher was inverted, the acid would mix with the soda water and form the fire extinguishing agent. The bottle comes with a lead stopper. It is in good condition and will make a nice addition to any collection. Winning bid pays shipping. Good luck bidding. VISIT OUR EBAY STORE FOR MORE GREAT AUCTIONS AND BUY-IT-NOW ITEMS.