The ones we get are yellow rectangular, tapering to the bottom, 27 and 35 lbs. When my wife goes shopping, she opts for the 27 pounder but if I'm with her, I always pick up the larger one.
Buckets with lids are good for all sorts of things. Kitchen receptacle for compostables, wash buckets, storage for all manner of things, as you mention...
Last use: I cut a hole in the side of one and Gooped a 4" tube into it to accept the dryer hose. This bucket has a hinged lid which acts as a retainer for a furnace filter cut to fit the top. Basically, it's a fine lint trap that lets the dryer vent indoors.