Klip-It Lunch Cube
Compact enough to fit inside a purse or backpack, this clever box contains dividers that separate―and stabilize―your meal and accompanying snacks. The airtight silicone seal prevents your bag from smelling like a tuna sandwich. 5 ⅝” x 5 ⅝” x 3 ¾.” Microwave, dishwasher, and freezer safe.
To buy: $5, containerstore.com.