This Friday, June 16th is "National Flip Flop Day." The Tropical Smoothie Oil center, and Ambassador Caffery locations are celebrating with free smoothies, and live music. Proceeds from the event go to send kids with life threatening illnesses to  Camp Sunshine in Casco, Maine. There will be a tent where you can donate and win prizes! Everybody wearing flip flops gets a free Sunshine Smoothie! The Oil Center Location will feature Subliminal Landmines from 2-7. The Ambassador Location will feature Esther Catahouligan Tyree and the Honkey Tonk Trio.