CVS has the single packs of the Crystal Light On the Go priced at 50¢.

There are tearpads for $1/2 Crystal Light or kool-Aid products. Look for them on either side of the cooler door near the bottled water.It excludes Kool-Aid single packets, but not Crystal Light.
There are 4 flavors – but not all 4 may be available at all stores.

Buy 2 Crystal Light Singles On the Go – 50¢ ea
USE: $1/2 tearpad
PRICE:  2 for Free

Thanks Mojo Savings