I have a small batch of beer that I made just for a party (2 gallons) and I don't really want to bother with cleaning bottles and stuff (lazy). I have a few metal growlers, two with the swingtop lids and one with a screw on lid. Can I just bottle in those? Will they hold carbonation?
I don't know what a "metal growler" is, but everything I've read has strongly discouraged carbonating in anything that wasn't specifically designed to withstand those pressures, i.e. kegs and standard beer/champagne bottles.
The swing top should be fine. If it's meant to hold beer and is stainless, it will hold beer-level carbonation. Just be careful opening the thing. I've seen some nice beersplosions with flip-tops when over-carbonated.
"Water?!? Are you trying to kill me? There's no ALCOHOL in that stuff!" -Leon
I've carbonated in a swing top before, it OK to do. I've also done it in a keg, the only issue is that you have to make sure the lid is completely sealed so that the CO2 does not escape while carbonating.