The first watering 'thingy' that was given to me was made from a flattish juice bottle, like Ocean Spray juices comes in. The lid was peppered with very small holes. Because the bottle is flat it's easy to grab and squeeze with two hands and the 64 ounce capacity easily waters the porch plants in one go. It is also very handy for rinsing suds off a squirmy dog on shampoo day!
I just upped the game by using the larger cat litter container (with the molded handle) which was too darn thick and beautiful to discard or even to re-cycle.