SupplementHunt offers two MuscleTech Lab Series Whey Protein + Isolate 5-lb. Jars for $99.98. Coupon code "LABSERIES10" cuts that to $39.99. (The coupon may apply automatically.) With $5.99 for shipping, that's tied with our mention from ten days ago and the lowest price we could find for this quantity by $34, although some retailers charge $120 or more. Each serving provides 50 grams of protein.