Protein powder

Amazon.  Look for a the unflavoured whey protein ISOLATE, Bulk Supplements Clean Whey Protein Powder - it is 90% pure protein.  This form doesn't upset many people who are lactose intolerant.

http://www.amazon.com/gp/product/B00E7IODXQ/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1

there are soy based protein powders you can buy they have no milk also egg based protein powders i would check  these websites they are usually the cheapest and vitamin shop has free shipping right now

http://www.vitaminshoppe.com/store/en/vitamins_minerals/inde x.jsp  

http://www.vitacost.com/

Health food stores can carry a variety of plant based protein stuffs. Try the Naturmade veg protein booster. 

The Whey Protein Isolate does contain Milk. Too bad, this is one of the better tasting protein powders. :-(

How fast do you all go through a bag?