From left, Tyson Apostol, Boston Rob Mariano, and Ethan Zohn on "Survivor: Winners at War."CBS Photo Archive/Getty Images Former "Survivor" contestants shared facts about the show that even die-hard fans might not know. There is a box in the woods containing supplies like sunscreen, bug spray, and vitamins. Competitors aren't allowed to go to the bathroom in the ocean at night. CBS' hit reality series "Survivor" features the highs and lows of competing on a remote island for several weeks, but there are some things about the game that aren't shown on-screen.Eight "Survivor" competitors spoke with Business Insider about their time on the show and shared behind-the-scenes secrets that might surprise even the series's biggest fans.