Now, YMMV (your manager may vary) on this one. I've done a deal similar to this before with no problems, but do pick your cashier wisely :)
Buy 2 Scrubbing Bubbles Vanish Drop-Ins @ $2.19 each = $4.38
Use the BOGO FREE MFQ Vanish Coupon (try zip 90210)
Stack with BOGO FREE Target coupon
= 2 for FREE!!!
Enjoy the FREE savings?