Double-layer vacuum insulation: no air between the inner wall and the outer shell of the stainless steel wine cup, has double insulation effect, keeps hot and cold. The improved insulation technology can keep the drink in vacuum insulated stainless steel wine glasses keep them hot for up to 5 hours or cold for up to 10 hours. In this way, you can enjoy your favourite drink on hot days with your favourite people. Even in winter, it keeps the coffee warm for a long time.Excellent materials: the stainless steel wine glasses are made of high-quality and food-safe 304 (18/8) stainless steel, this metal is very strong and of high purity, BPA free, non-toxic, no smell, environmentally friendly, durable, rust-proof and easy to wash. In addition, vacuum insulated wine glasses prevent the transfer of taste and are neutral.Unique cup lid design: the lid of this stainless steel wine cup with lid keeps the inside of the cup airtight to keep the temperature better. The lid features a new sliding design that minimises liquid leakage. With reusable 2 pieces stainless steel straws made of stainless steel for easy drinking and protecting the environment.Beautiful gifts: these stainless steel wine cups have a smooth surface and beautiful colours, curved cup shape, exquisite and beautiful, easy to grip. The simple yet beautiful look makes the stainless steel wine glass without handle very popular. This stainless steel wine glass is the best birthday, Mother's Day, Thanksgiving, Christmas gifts for you, your family and friends. Camping wine cup ideal for use when you are out with your family.Comprehensive use: stainless steel wine cup to go for juice, coffee, cocktails, wine, sparkling wine, beer and other drinks etc. You can take it anywhere. Ideal for swimming pools, beaches, barbecues, picnics, camping, boat trips, family reunions, gatherings with friends.