The HomeLife Solutions 18 Oz Stemless Stainless Steel Wine glass is made of durable 18/8 quality Stainless and its satin finish looks beautiful. These great cocktail / wine glasses are great for keeping drinks cooler for longer periods of time. Glass and plastic are simply not as good at insulating. It’s great for serving wine, cocktails, and any other tasty cold drink. Why Stainless Steel and not Glass? The stainless steel construction of this cup makes it lighter than glass, more durable than glass, and it will keep your drink cooler longer. No more worrying about dropping your glass and it shattering everywhere. Food grade #304 or 18/8 stainless steel means, there is 18% chromium and 8% nickel. This is a high quality SS that most high quality utensils or stainless steel reusable water bottles are made of. High quality Stainless Steel Translated to, no nickel leaching, which in turn means safer for consumers like you. Why it’s safer for you With high quality Stainless Steel, cups should not taste metallic either, which is unlike aluminum bottles. Stainless steel cups are safer for use in any area. Unlike glass, Stainless steel cups can be used by pool side, schools, camping, anywhere you travel, gyms, beaches, and any other areas that do not allow fragile glass bottles for safety reasons. Stainless steel has no limitation for usage and will not hurt anyone since it does not leach chemicals (as in plastic) or break (as in glass), and possibly cause bodily harm. Recyclable Stainless steel is 100% recyclable: When recycled, each component can be separated and reused. In fact, stainless steel should never end up as a waste. It can be reused time and time again so the sustainability factor beats any other material for its life cycle length.