LockandLock Lunch Box Set Insulated Bag 3 Tritan Containers (Blue) Microwave, freezer and dishwasher safe. Lock&Lock is Global Brand of Korea. Excellent airtight and watertight with patented 4-hinge locking system with silicone sealing ring Blue bag measures 7.5 x 4.5 x 4.5. Two of the small interior boxes measures 3.5 x 3.5 x 1.6. The larger box measures 3.5 x 3.5 x 3. Tritan : BPA free material for strong durability and safety. Grip handle : Durable and easy to use.