MIGO MIGO Blue Ice freezer packs snap directly to food containers Colorful modular containers snap together to save space and stay organized, keeping your child's lunch chilled when they're at school, on trips or more can be stacked to fit various lunch bag shapes and sizes Durable containers have a secure lid seal to prevent leaking Size: 4.8" L x 5.6" W x 5.3" H when stacked