You can just get a cap that will fit on any bottle and attach to a traditional c02 tank. Added benefit that if you use this with any regularity it will cost you much less over time.

You can also get corny kegs like the other person posted but those can be pricey. You can get them cheap at restaurant auctions sometimes (I basically got mine for free but they were gross). These take up a decent amount of space but you can make a lot of stuff at once