The B.Box Gel Cooler Twin Pack is a handy set of two reusable gel coolers that fit neatly under the sandwich tray of b.box lunchboxes or inside insulated lunch bags. Simply freeze overnight and pop into your child’s lunchbox to keep food fresher for longer. With a slim design and safe, non-toxic gel, these coolers are practical for everyday use and versatile enough to double as mini cold packs for soothing little injuries.