How to use 1.Pour in hot water / cold water, cover lid, let it stand for for 5 ~ 10 minutes to preheat / precool the jar, empty the water. 2.Pack your food and cover lid. 3.When eating, press the vent button for 1 to 2 times and then open the inner insulation cover.Why choose DaCool insulated food jarFirstly, Unique technology and sweet design 1. Seamless welding technology of inner tank to enhance insulation. 2. Copper coated to enhance insulation. 3. Double wall 304 stainless steel Vacuum Insulated. 4. Double lids, outer lid can hold food, which can enhance insulation and leak proof. 5. Inner lid has an balanced pressure exhaust valve, please do not worry that you can't open lid after packing hot food for a long time, just press the exhaust valve for 1~2 times and then open it easily. 6. Equipped with a folding stainless steel spoon. 7. Equipped with non-slip mat at the bottom of food jar. 8. Beautiful pink color, really nice in appearance!What's more, LIFETIME Friendly Customer Service. We offer this hot food jar lifetime friendly customer service. If you have any question or your experience is not good, please feel free to contact us seller via Amazon message, we will provide you good customer service ASAP. Thank you so much for your trust.Material Food Jar: Double-layer 304 stainless steel, Copper coated insulation Outer Lid: Food-grade pp Inner Lid: Food-grade silicone Spoon: 304 stainless steel All of material are food-grade material, BPA free, PVC free.Specification Capacity: 16 ounce Wide mouth: 3 inchSize: 5.8*3.7*3.7 in Weight: 12 oz / 350gColor: Cyan Blue/Pink/Gray/BlackWhat you get1 x Insulated food jar1 x Stainless steel folding spoon 1 x User manualLifetime friendly customer service.