i use flexi tubs now spend to much money on those cheap black b&q buckets there useless after 1 go. I just let the adhesive go of in the tub and hit it with a rubber mallet and good as new ready for the next job!
B&Q buckets are ok, but they do split when you throw your trowel in them. On the other hand, if you leave rapid set in a £5 bucket when you go to lunch!!! I've done it!!! the cheaper bucket works out better!!!!
I'm getting plenty to too many buckets off the painters at the moment, only trouble is where to store them, I am favouring the gorilla tubs as well, the small ones are way less than a fiver and clean easily, stack nicer in the van than the painters empties, it won't be long before I go completely ape, if you know what I mean.