Question: What type of steel is it made of, 304 or 301? Answer: 304. Product Description: Material:Stainless Steel, Silicone Color:Silver,Gold,Rose gold,Black,Purple,Blue,Multicolor Quantity:1 Set Feature:Eco-Friendly, Collapsible Features: Material -- The body of the straw made of food-grade stainless steel, no metal aftertaste, plastic free, dishwasher safe, reusable and Eco - friendly. Healthy -- The Collapsible Straw's interior tube is exquisitely made of medical-grade Silicone material, which ensures that every time drinking as safe as your daily eating food. Reusable -- It features sturdy & rust-proof material, won't shatter like glass ones. It's design to serve as a reusable straw,which can take place of plastic straws which causes heavy pollutions and huge waste of money. Can be used again & again. Package Included: 1 x Reuable Straw 1 x Brush