Releasing its new fruit seltzer, Tava, Pepsico (apparently via agency Element 79) set up a stand of free drinks for gallery attendees at Designbox during the First Friday show of “Some of the Parts.” Designbox is the home of Gamil, Gamila and other design offices in Raleigh. This test was the premier event initiated in the Raleigh area. Informal impressions of the drink were mixed.