[mrs bouquet]

Make some holes in the bottom of florists buckets, they are plastic and I haven't got a drill ?   thanks, Mrs Bouquet

[Goosegirl]

Try twisting a sharpened small screwdriver or a scissor blade into the base, or heat them over a cooker and burn the holes.

[Auntiemogs]

I usually heat up the end of a screwdriver and poke it through. 

[8doubles]

As above a heated large nail , old screwdriver or similar .
I use an electric soldering iron.
A melted hole rarely causes a split to form like a drilled hole does.

[al78]

Get a small sharp knife and use it like a hand drill, pointy end down, push down and twist back and forth.