Material: Stainless Steel 3-in-1 Straw, Stirrer & Filter Environmentally-friendly to use Washable & Reusable Material: drinking straws made of premium food grade stainless steel, non-toxic, reusable and Eco-Friendly Stainless steel straws approx. the base hole dia approx. 1mm Double-sided encryption pinhole, the filter make sipping tea more health and convenience These straws very perfect for yerba mate, loose leaf teas, fresh coffee, pulpy juices, lemonade and more; also can be used as spoons Package included 1 Pieces Drinking Straws with 1 Pieces Cleaning Brushes, easy to clean