Costco Sale: The Original Stream Machine Water Cannon 2-Pk $9.99 by Rhonda July 18, 2020 4/29/16. This is from the Costco May 2016 Coupon Book. Shoots up to 70 feet! Costco has the The Original Stream Machine Water Cannon 2-Pack on sale for $9.99 (after manufacturer’s … 0 FacebookTwitterPinterestEmail