Made of food grade stainless steel and silicone. The collapsible straw can be retracted into small size and put into the portable case, handy and lightweight, perfect for putting in the pocket/bag or tie to your belt wherever you go. Each reusable straw comes with 1 cleaning brush. All they can be the best gifts for your family or fiends on the Thanksgiving, Christmas, New Year, Birthdays, Weddings etc.