Amazon has the Cascade Action Pack Regular, 20 count on sale for $3.97 with
a $0.25 off coupon. But if you check out with Subscribe and Save and apply
the coupon on the product page, then it brings it down to $3.12. Shipping is
free if you do Subscribe and Save and as always, you can cancel at any time.
Link: http://www.amazon.com/Cascade-Action-Pack-Regular-20/dp/B0000DA