I'm not sure, but it looks like a keg that came with an early kit I used years ago. You can use it to dispense beer, but it will be flat, unless you can pressurize it with CO2 or priming sugar. You could use it to serve a sort of cask conditioned beer.
Get yourself some Cornelius kegs if you want to get away from bottles. Much easier. Much less cleaning, and you can dispense beer just like at the pub with it.