GoodBelly products are on sale at Whole Foods. Use a boosted Hopster coupon to get a four-pack of GoodBelly Organic StraightShot Probiotic Drinks for $0.50. That’s only $0.13 per shot!

Use $2.00/1GoodBelly Product, must Boost coupon for value  (hopster.com)

Final Price: $0.50, or $0.13 each shot