Often the advice is given to ask at your local bakery / grocery store for the 3 1/2 to 5 gallon food grade plastic buckets they get frosting, dough, and deli items in from distributors, because after those buckets are emptied the store will usually just throw them away; and by asking you can sometimes get them for free. I never had much luck with that because apparently my local store was determined to recycle said buckets. But the mere act of asking for them, it seems, let them know there was a potential market. And just this week I saw cleaned buckets on display, being offered for $3.50 each. Which is better than not being able to get them at all, but still.
If you're in a place where you can still get such buckets for free, I'd suggest grabbing all you can, before the store realizes what they've got and starts slapping price stickers on them.
If you're in a place where you can still get such buckets for free, I'd suggest grabbing all you can, before the store realizes what they've got and starts slapping price stickers on them.