what me and my partner did (mostly my partner) was take the tub out of an old washing machine, take the liner out and what is left is a metal tub with many pencil sized holes...about two or three feel tall and two foot across...can hang it from a dock with a few big rocks in it to keep it level...or several big rocks to hold it to the bottom...finally had to put a lid on it to keep the varmits and critters out of it...as you know always keep it tied to something solid...with current it will keep fish and bait alive a long time...also with no lid those ninja fish will jump out of it...of course not speaking from personnel experience..