The Who Needs Luck With All This Charm Maker 20 Oz Soft Matte is our most updated Maker style – combining the sleek silhouette of our top-selling Skinny Steel with a screw-on, slide closure sip lid. Matching straw included is our updated design that is composed of a new material that makes it flexible while remaining durable. Easily transport hot and cold beverages to the office or around the home. Crafted with our high-quality, food-grade 18/8 stainless steel (304 stainless steel). This material is commonly found in professional kitchens; utilized for its non-porous nature for resistance against bacteria, mold, and lingering odors. The 18% chromium and 8% nickel composition makes it less likely to rust or corrode.