Zulera via Amazon offers Bob's Red Mill Protein Powder Nutritional Booster 16-oz. Bag in Chai for $19.28. (Non-members can spend $35 to bag free shipping; otherwise, it adds $7.54.) That's the lowest total price we could find by $6. It features 20g of vegan protein, 9g of soluble fiber, and 240mg of omega-3 fatty acids per serving.