Rain water out of the water butt it is.
Carefull. Despite what people say rain water clears the air of pullotants and isn't clean. By the time it goes into a water butt it may well have bird and rat shit it it from the drains. Bactaria from deceomposing leaves may also be harmful. You're far better off using some tap water.
I figured it'd be less wasteful. I'll make sure I keep my mouth shut.
that's the opposite of what the challenge is all about...
I'm supposed to get dysentery??
No you're right its been renamed the "oxfam tepid water butt challenge"
Oh, I still bought some ice to waste as well!