A Wal-Mart in my area sells MMO in gallon jugs. I'll try that out next, but probably will continue to use my 'fill' bottle as the quart since it's marked in 4 oz increments on the bottle. I just do a quick 'pour, pour, pour'...in about 3 seconds or so; then recheck where the level is on the bottle's marking and drip a quick last one if I stopped short of the gas/mmo mixture I was going for.