Empty Kilwin's buckets that is. Yes, they offer these. I think they're 2 gallon buckets, cleaned and emptied, but they are very thin so not very practical for storing stuff (like, say, a rigid 5-gallon paint bucket might be).
Oh, the ice cream is very good. The waffle cone or bowl is good but pretty thick - not recommended to bite into with your if you have delicate dental or orthodontic work! Many tempting confections are available, but alas, we didn't have room for them.