also in 2010, the first "green" 7-eleven store opened in deland, florida. the store features u.s. green building council's (usgbc) leadership in energy and environmental design (leed) elements. also, the environmentally-friendly design brings the store savings in energy costs. that same year, 7-eleven went mobile with the launch of the known slurpee drink's iphone and android application (app). the slurpee drink app made it easy to find 7-eleven stores and gives driving directions. the following year, 7-eleven celebrated its 40,000th store opening and within two years of that goal opened its 50,000th store.