Safety materialThe inner liner of the baby cup is made of high-quality 316 stainless steel, and the lid is made of polypropylene, which is resistant to high temperature, safe, non-toxic, and healthy. No leakageThe leak-proof function components are tightly installed, and the 360-degree play does not leak. You are not afraid of getting the bag wet when playing outdoors. Scientific heat preservation6-layer heat preservation technology, long-lasting and strong temperature control, 316 stainless steel liner + copper plating process + vacuum technology, after repeated heat preservation tests to ensure that the lasting lock temperature is achieved. Silicone strawsThe straws of the thermos cup are made of food contact silica gel, which does not contain BPA, is fresh and has no peculiar smell and is bite resistant. The silicone straws do not contain BPA. Easy to controlThe scale on the wall of the cup is clearly visible, and the mother can easily control the baby's water intake.