Grichard,
I just got off the phone with Sunset Aquatech. The are close to my office, so I thought I'd get some info as well. They charge $17.25 for a 5 gallon bucket and a $12 refundable deposit. The lady stated that the Chlorine is 12%, but they have to label it as 10%. So at $3.45 a gallon it is cheaper than Menards normal price of $3.99 and achieves your goal of less plastic jugs. I'm too much of a tight Rear and will wait for Menards BOGO. Have a great day and GO BLUES!!!
-Chad