Myprotein offers its Myprotein Impact Whey Protein 5.5-lb. Pouch in several flavors for $54.99. Add two to your cart for $109.98, then apply coupon code "IWP53" to cut them to $53.99. Shipping costs $4.99. It's made from grass-fed whey and features 21g of protein per serving. Deal ends May 30.