The transparent glasses with colored spiral are made of TOP QUALITY methacrylate, a plastic material more transparent than glass, UV resistant, and 100% recyclable. They are ideal for outdoor use for: picnics, barbecues, boat parties, birthdays, anniversaries, garden parties, outdoor lunches or dinners. Practically, methacrylate glasses are a very valid solution since single-use plastic will be banned and glass, if broken, is dangerous in places like spas, pools, wellness areas, and public events. Dishwasher safe using a neutral detergent, at a maximum temperature of 60 degrees, on the top rack of the machine. Available in 11 elegant versions: with SOLID SPIRAL in the following colors: cream, green, and brown, and with TRANSPARENT SPIRAL in the following colors: green, cyclamen, mustard, black, rust, white, turquoise, and blue.