These sustainable straws are made of 18/8 food grade stainless steel and silicone, with no metallic aftertaste, no bisphenol A, no lead, no plastic, and are non-toxic. They are very durable and can be washed with a dishwasher. They are washable, rust resistant, and scratch resistant. 11.81 "long x 0.375" wide, with a total of 6 long stainless steel straws. Compatible with stanley straw replacement 40oz 30oz Adventure Quencher Travel Tumbler. Perfect for Stanley cup accessories. Perfect for hot and cold drinks. This product uses our polishing technology, and the surface of the straw is well polished. The lips and hands feel very smooth, and compared to other metal brackets, the silicone cap is easier to open/close. Our metal straws have smooth circular edges at each tip.