Vertis Presents Lunch Box Container Quad Lock Pp Lid For The Exclusive You-The Healthy Connoisseur. Ideally Designed For Saving Space, The Light Weight Container Are Stackable And The 4 Side Locking Along With The Airtight Silicone Ensure That Your Food Remains Fresh For A Long Time; Versatile Functionality Goes Hand In Hand With The Unmatched Elegant Looks. You Can Also Heat/Cook Small Quantities In The Gas Stove. Made From 3.3 Borosilicate Glass, It Can Withstand A Temperature Of 500 Deg C Making It The Best In Class For Microwave And Conventional Oven Operations. Made From 3.3 Borosilicate Glass, Guaranteed Temperature Resistance From -30 Deg C Up To 500 Deg C