A 600ml / 20 fl oz stainless steel lunch box that is the first 100% leakproof one on the market due to having a secure vacuum-sealed closure. 100% leakproof Oven and freezer safe Includes fork Plastic free High quality stainless steel Stainless steel (304/18-8), including a silicone strap and a stainless steel fork. L 17.5cm  W 13cm  H 5cm / L 6.89"  W 5.12"  H 1.97" Weight: 330g/0.73Lbs 600 ml / 20 fl oz How do I open the Stainless Steel Box?To open the box/release the vacuum, pull the valve upwards. Then separate the lid from the box by pulling at a corner/short side. Please be careful when the box contains liquids.Is the Stainless Steel Box leak proof?Yes, the Stainless Steel Box is leak proof. To ensure the box is locked & sealed properly, check that the edges of the base and silicone seal on the lid are clean and dry. Firmly push the lid down on all sides and then press the valve down. Secure the box with the silicone strap. WARNING – Allow hot foods to cool first before transporting, as otherwise the box could leak. Is the Stainless Steel Box microwave safe?WARNING: Do not use in the microwave. Is the Stainless Steel Box oven safe? Yes, the base and slider/divider are oven safe; however please note do not put the lid in the oven and note that using the box in the oven could cause discolouration.Is the Stainless Steel box freezer safe?Yes, the box is freezer safe for food storage.Is the Stainless Steel Box dishwasher safe?The Steel box base, the fork and slider-divider are dishwasher safe. Please ensure you always wash the lid, and strap by hand only. IMPORTANT: Do not use bleach, cleaners containing chlorine, abrasive cleaners or scrubbers on any part of the box as they may dull the finish. Larger Size available here