Sonic The Hedge Hog video game by Sega remains the most popular gaming franchise in the world. Knuckles the Echidna is a character that appears in the hit series Sonic The Hedgehog. He is an anthropomorphic short beaked echidna is Sonic's secondary best friend and form rival. Determined and serious, but gullible, he fights his enemies with brute strength. He serves as the guardian of the Master Emerald, a huge gemstone that controls the series' integral Chaos Emeralds! This is a must have backpack for any gamer and perfect for school or travel! This cool 3D lunch box features Sonic's head, spikes and all! It has foam insulation and PEVA waterproof lining to keep food fresh all day at school or when traveling. Measures 9.5” x 7.5” x 3.5” and is made from water resistant durable nylon twill material