Amazon has 6-Count 7-Oz Renuzit Adjustable Air Freshener Gel (Forever Raspberry) for $3.79 when you ‘clip’ the $0.93 off coupon on the product page and checkout via Subscribe & Save. Shipping is free with Prime or on orders $25+.
Note you must be logged into your Amazon account in order to clip the coupon. Coupons are typically one use per account. You may cancel your Subscribe & Save subscription any time after your order ships.