100% Leak Proof inner container. 4 Side Lock Tiffin. Microwave Safe without Lid. Easily fits in School & Office Bags. with attractive overprint design. Inner container is microwaveable without the lid. Four-side locking outer lid. Sleek design. The inimitable Milton Tiffins and Lunch Boxes range have been constantly evolving and moving ahead with time. This Tiffin is a non-insulated tiffin that contains one plastic leak-proof container inside and a four-side locking lid. Its sleek shape ensures that it will fit in any bag!. The most safe & healthy material for water bottles, 100% BPA FREE!