Buy Grape Runtz UK Moonrocks – Hot Box Online. Grape Runtz Moonrocks​​ have arrived. Shatter moonrocks are made with premium cannabis bud, covered in liquified shatter, and dipped in pure THC. Grape Runtz is an evenly balanced hybrid strain (50% Indica/50% Sativa) created by crossing the delicious Zkittlez X Gelato X Grape Ape X OG Kush strains.