High Durable Finish -- 304 stainless steel forged heavy duty drinking cups coating with gold/rainbow finish, won’t peel like paint compared to other glasses. Food Grade Safety -- These eco-friendly cups are odorless and free from silicone, BPA, lead, and toxic chemicals, making them safe to be used by both kids and adults on an everyday basis. Non-Breakable & Stackable -- Sturdy stainless steel cups resistant to rust and breakage, allowing you to reuse them repeatedly. Save a lot of space in your kitchen cabinets by stacking these stainless steel cups over one another. Easy to Clean -- Dishwasher safe, expect new looking cups everytime, not suitable for microwave and oven. Great for Indoor & Outdoor Use -- Lightweigt and stackable, these drinking cups are perfect for home and bar use, as well as for outdoor affairs like parties, picnics, camping, and hiking. They’re eco-friendly alternatives to the usual plastic cups.