$2/1 Benefiber Product Coupon December 21, 2011 This post may contain a link to an affiliate. See my disclosure policy for more information. Coupons.com has just released a new $2/1 Benefiber product printable coupon! This should make for some great deals on the smaller sizes, or pair with a Register Reward deal. Walmart sells the small packs for around $2.97, so $0.97 after the coupon.