The green-colored citrus drink will be available in 10-packs of 6-ounce juice boxes and 6- and 12-packs of 11.5-oz aluminum cans starting May 30, 2016. The cans are printed with thermal ink that turns green when they're cold.
Hi-C Ecto Cooler was originally introduced in 1987 with the original Ghostbusters franchise (they basically took Hi-C Citrus Cooler, colored in green, and renamed it "Ecto Cooler"). It was discontinued in 2001.
Photo via Coca-Cola Company.