Safety lock: One key to open the lid, more convenient for drinking, preventing water leakage caused by accidental touch. Silicone nozzle: food-grade silicone nozzle, soft silicone, protects the gums. Scale display: accurate scale, standard drinking water, healthy life every day. No leakage when placed upside down: 360° upside down, no water leakage, good airtightness, no fear of putting it in a bag. Cup rope design: with a cup rope, you can carry it cross-body when you go out, making travel more convenient and free your hands. Healthy material: 100% BPA Free, Capacity is 1000ml.