For these cases, it's good to have a quick-and-easy fermenter that's small enough to do quick runs.
Step 1: Collect Components
1 - The base of the fermenter is a bottle of soda, any size. Here we use a 2 liter bottle.
2 - Airlock. This is a cheapass one from the brewstore.
3 - Plumber's Putty
4 - Hole making tools
Step 2: Prepare Lid for Airlock
The plastic melts if the drill bit is too fast, so go slow, and you will still probably need to trim off some plastic with a knife.
Step 3: Prepare your wash and cap it
Step 4: Insert airlock and seal
This cheapo airlock is molded all wrong for this, so you'll have to get a really good seal on the putty. The more expensive 3-piece airlocks have flat bottoms and can be pushed down to make a really good seal.