How to use: Cut the length of the straw according to the instructions. After assembling the straw accessories, pass the straw through the middle cover and pull it tightly. The nozzle and straw are tightened to the end, and the bottle cap is tightened to complete. Material: Nozzle ‧ Straw: Silicone (-20℃~ 120℃) straw connection joint: polypropylene (-20℃~ 100℃) catheter beads: polypropylene ‧ stainless steel (-20℃~ 100℃)