Innovative concept, clear design & clever multi-functionality: keep food fresh in the fridge & freezer & heat it directly in the microwave BISFREE meal prep and storage boxes: 11 fresh boxes in 4 sizes: 4 x 260ml, 4 x 450ml, 2 x 910 ml, 1 x 3, 5l - without BPA, also safe/suitable for baby food Hygienic & easy-care food containers, made of scratch & break-resistant Tritan plastic - Aroma-resistant & dishwasher-safe The easy-to-handle lid with patented silicone safety closure makes the transparent fresh box water resistant, leakproof & airtight Food containers from LOCK & LOCK keep food fresh and hygienic in style & at the same time serve as practical microwave dishes