CVS has Crystal Light Singles on sale 2/$1. If your area got it, use the $1/2 Crystal Light coupon (with no size restrictions!) from 3/18 SS to get two for free!
I have done this deal several times in the past with similar coupons, so this shouldn’t be a problem for you. The Crystal Light singles are usually kept in little shelves that are literally attached to the front of the coolers where the water and pop is kept.
(Thanks Mashup Mom!)