Amazon offers the Premier Protein 30g 11-oz. Protein Shake 12-Pack in Bananas & Cream for $16.66. Change the quantity to four 12-packs (48 bottles total) and order via Subscribe & Save for an in-cart price of $43.41. With free shipping, that's $0.90 per shake, $7 below our July mention (which saw 12-packs for $12 each), and about $23 less than you could expect to pay at local warehouse club stores for this quantity. (For further comparison, most local grocery stores charge around $9 for just a 4-pack, which would total about $108 if you bought 48 shakes.) Each shake contains 30 grams of protein.

Note: Be sure to cancel Subscribe & Save after your order ships to avoid being billed for subsequent shipments.