At my local Lowes they had a pallet of 2 gallon blue buckets on clearance for 36 cents each.
Letica 2-Gallon Residential Bucket
https://www.lowes.com/pd/Letica-2…t/50434786
https://brickseek.com/lowes-inven…u=50434
These are the plain buckets they sell without a lid. Great for all sorts of small jobs and easily disposable at this price.