[header] How to make a camp washing machine [title] Find or purchase a 19 litre/5 gallon plastic bucket that has a lid. [step] A size near enough is fine too, provided that it has a lid. If you have a restaurant industry wholesaler near you, food buckets with lids work just as well. 
[title] Purchase a brand new toilet plunger brush. [title] Cut a hole in the lid that is big enough to insert the plunger handle through.