[amazon.com](https://npw.clicorice.ca/links/8POUbX) has a 4-Pack of Purex Crystals In-Wash Fragrance & Scent Booster (21oz each) for $15.88 – 5% off with Subscribe & Save (cancel anytime) – $4.32 off coupon (checked save an extra box, eligible on first S&S order for this product) = **$10.77** with free shipping on $25+ or with Prime.