Smiggle Kids Gabby's Dollhouse Lunchbox (3+ Yrs) - Purple Mix - Available at M&S
This double-decker lunchbox from Smiggle is great for keeping their snacks organised. It has two tiered compartments to keep food fresh and is secured with zip fastenings. There's a top handle and a cross-body strap so they can carry it with ease. The design comes in a range of colours and patterns.