Whole Foods Market to host four-day sale on WTRMLN WTR beverages from National Watermelon Day, August 3   AUSTIN, Texas, 2017-Jul-27 — /EPR Retail News/ — On National Watermelon Day, August 3, Whole Foods Market is kicking off a four-day sale on WTRMLN WTR beverages. From August 3 through 6, customers can pick up two bottles of…