Wet One's 40 pack is on sale at Walgreens for 2/$4 and then you get $1 back in Register Rewards.
Go here put in your name and email and you can print a coupon for .75, push the back button to print twice. This makes each canister 75 cents. If you happened to print this out a couple weeks ago when the coupon was $1.50/1 you can get them both for free.
Note: At Walgreens you need to have more items then coupons. I always get a little sticker book if I need something extra.