Yumbox is a leakproof lunch container with a clever silicone lid that engages with the tray to create a tight seal keeping food contents in place. While Yumbox is fun to use and a pleasure to pack, it is also an educational tool that helps children develop healthy eating habits. Encourage your kids to pack their own Yumbox and soon they will be making healthy choices for themselves. Like most mums, the founders are practical. they wanted to create a box that was easy for kids to use and a cinch for parents to pack. It cleans easily, will save you money, and will help you to reduce waste. Made of food-safe materials, they are BPA-free and phthalates-free.