The ginger beer is now in bottles:
1 x 2l bottle
10 x 1l bottles
16 x 500ml bottles
I'd normally use at least litre bottles, or two litre bottles for preference (to get the drink off the sediment) but you use what you can get. It'll take a few weeks for the pressure to build up and for the drink to carbonate: so sadly not ready for this weekend's Greenbelt ops meeting.
I'll take some of the mystery drink with me instead.