Amazon has 23-Oz Finish Jet-Dry Dishwasher Rinse Agent & Drying Agent for $6.56 when you ‘clip’ the $1.64 coupon located on the product page and checkout via Subscribe & Save. Shipping is free w/ Prime or on orders of $25 or more.
Note: Coupons are typically limited to one per account. You may cancel Subscribe & Save any time after your order ship