Get a water butt
I was going to use the one from my ma's garden but she said she needed that for collecting water in ... weird, so we got this one from a strange place in the Forest of Dean. It was only a tenner as it was second hand; it used to hold BBQ sauce in. Turns out it still had 3 buckets of BBQ sauce in for first thing we did was empty it and wash it. I smelly saucy.
Cut hole in water butt
We cut a hole in the top using a saw and jigsaw. By 'we' I mean my Dad as 24 is still not old enough to use power tools apparently.