A couple years ago I dumpster dived two sturdy plastic sprinkler cans I like to dip into rain barrels and fish ponds to spot water seed trays, etc. with. But the holes were so tiny the flow rate was very low, plus the holes would plug easily with bits of mulch, etc. So a few months ago it FINALLY occured to me to solve the problem by drilling a few larger holes into the spray heads. Now they dispense much more water yet are gentle enough for seed trays, plus rarely get stopped up. It took just a few seconds to modify each watering can....now I love using them. Their being free adds to the satisfaction!