[Office Partner Information Center] If you drop from a height of 1 meter or fold it into 360° or spin it, it will not break the core, it is easy to roll, and the refill will not break or have no toner. This creative product is a fun toy product that is not suitable for long-term use when writing. Dropped from a height of 1 meter or folded into 360° or twisted and folded, it will not break the core, it is easy to roll, and the refill will not break or have no toner. This creative product is a fun toy product that is not suitable for long-term use when writing. Water Bottle,Glass Water Bottle,Steel Water Bottle,Thermos Water Bottle YONGKANG SONGDAO ELECTRICAL CO., LTD , https://www.sodobottles.com