Description:All-borosilicate glass, no metal, plastic-free, is a safe and suitable alternative to plastic, these are safer for the environment, no plastic.[Smooth /Functition] The surface of our straws is very smooth and rounded, scratch-proof, and they won't cut your lips, are effective anti-slip, and are easy to clean and carry.[Cleaning Brush] Equipped with a stainless steel cleaning brush that can tap into the inside of the straws, easy to do the clean work and use it repeatedly[Wide Applications] Great for use in cocktails, soft drinks, and coffee. Also suitable for family parties, outdoor picnics, hiking, trips, and office use, and an excellent gift for any occasion.Specification:Straw Length: 150mm/5.91"Straw Diameter: 7.5mm/0.3"Straw Thickness: 0.5mm/0.02"