https://amzn.to/3ICJKDW Prime Members: 4-Count Brita Plus Water Filter Refill on sale for $19.49 - $3.90 (20%) off when you 'clip' the coupon on the product page - $0.97 (5%) off when you checkout via Subscribe & Save = $14.62. Shipping is free w/ Prime or on $35+ orders.