I've heard some of you are having trouble finding the Cascade 3pk. Here's a few Walmarts carrying them..
1) Kewanee, IL
2) Moline, IL -John Deere Rd store
3) Muscatine, IA
At both the Kewanee & Moline locations, I found the Cascade 3pk next to the rest of the dishwasher soaps. Make sure to look high and low! Good luck, I hope you all are able to use up those coupons before they expire on the 31st!