Retains Temperature Longer The Go Solo tumbler glass has two layers of 304 stainless steel, between which there is a vacuum insulation to maintain the temperature of the drink for longer. Enjoy hot or iced coffee, this tumbler will maintain the temperature according to your wishes. Unique and Ergonomic Design Comes with a unique egg-shaped design that will be comfortable in your grip. The small shape and unbreakable material allow you to take it on a picnic. So you can enjoy your favorite drink at home or outdoors. Anti-Spill and Leak Lid The tumbler glass lid is designed to be anti-spill and leak, so you can carry it in a bag or backpack without worrying about spilling. The tight lid also helps maintain the authentic taste of the drink and protects the contents of the drink from external contamination such as dust.