I opened it once to take it out, but I put it back and stored it without using it. It's easy to bend, and it can thoroughly wash long straws! Easy-to-hold shape! It can thoroughly wash the inside of straws! ● Can be used for MagMag straws and pet bottle straws. ● Can also be used for the mouthpieces of Pigeon "Nose-Clearing Tube" and "Dropper Medicine Feeder", etc. It can also be used to wash water bottles for adults and kids. [Handle] Material: Polypropylene Heat resistance: 120℃ [Tip] Material: ABS resin Heat resistance: 70℃ [Brush] Material: Nylon Heat resistance: 80℃ [Brush shaft] Material: Stainless steel ★ It has been stored at home, so please purchase if you understand.