The Scrubbing Bubbles Automatic Shower Cleaner is on sale at Walgreens this week. It costs $10 and you get $3 extra bucks. There is also a $5 coupon at
That ends up costing $2 after the coupon and register rewards.
Beware, though, when going to Walgreens. There coupon policy is very weird. You are only allowed one coupon or register reward per item so what I do is grab a pack of gum just so I have two items.
Also many Walgreens are out of it since it is such a good deal so I would call before you go to make sure they have it.