Glass Drinking Straw: Size : Long About 20cm , Diameter About 8mm Material:Borosilicate Temperature -30---250 Package Included: 1x Apiece Round Head Glass Drinking Straw - Made of durable Pyrex Borosilicate glass they are Dishwasher safe, BPA free and hypoallergenic. - Great for hot or cold beverages and the environment. - A stir stick and make a great drink identifier. - Also fits the new BPA free Ball Jar sip lids that are rust free for togo cups. DISCLAIMER: These Pyrex glass borosilicate drinking straws are very durable but are to be used like any drinking glass with caution. They can be damaged chipped and or broken with use and should be checked each time before use and discarded if damaged. Although not intended for children if used by children they should be supervised by an adult at all times.