This telescopic straw is made from 100% food grade 304 stainless steel which is FDA Approved & BPA Free with no metallic or chemical taste. The telescopic straw is flexible in design. Its length can be adjusted from 4.2" to 9.4", and the three parts can be stretched and combined. Suitable for most types of cups. There is a plastic case included to keep your straws clean and easy to carry on the go. The case comes with a carabiner which makes it convenient to carry them anywhere in your purse, bag or pocket. The straw set comes with an adjustable steel brush cleaner that helps to keep your straw in a clean condition all the time. Stainless steel straw is reusable, which can replace the plastic and paper straw used daily.