Durable Material - Drinking straws are made of 304 stainless steel, which is heat resistant, durable, and not prone to crack or break. The sturdy material ensures its longevity, preventing rust and corrosion for extended use over time. Furthermore, the stainless steel keeps your cold beverages a refresh drinking experience. Adjustable & Portable Design - Our collapsible straw can change the length from 3.74" - 9.06" - fit your different cups. Each stainless steel straw and cleaning brush can be retracted into small sizes and put into the portable case with a buckle. Perfect for tying to your bag or putting in the pocket. Reusable - These stainless steel straws can be used over and over again, reducing the amount of plastic waste. As a suitable alternative to plastic straws, each reusable straw has the probability to eliminate up to 500 plastic straws over its longevity. Easy to Clean - Cleaning these metal straws is a breeze. Simply use the cleaning brushes, followed by a cleaning cloth to dry them. Keep the interior of the tube clean for the continued enjoyment of your favorite beverages. Versatile Application - Reusable metal straws are available in different colors to fit different types of drinks. Suitable for enjoy beverages, juice, soda, coffee, tea, cocktail, and more cold and hot drinks in family gatherings, parties, outdoor picnics, barbecues, camping, etc. Material: 304 Stainless Steel Finish: Plating Color: Silver Tone(Straw); Blue(Case) Straw Length: 95mm/3.74" - 230mm/9.06" Outer Diameter: 7mm/0.28"(Min. OD); 9mm/0.35"(Max. OD) Thickness: 0.5mm/0.02-inch Brush Length: 105mm/4.13" - 240mm/9.45" 4pcs x Metal Straws(Each straw with a cleaning brush and storage case)