Made of AS material, double wall construction provides sweat free insulation, while keeping hot and cold liquids at the ideal temperature longer. Double walled tumbler keeps your cup rid of condensation so your car or desk are mess-free. The slim design is easy to carry and fits well in most cupholders and the silicone straw. These tumblers are designed with a convenient and portable slim body that is a comfortable size to hold, and you can use for multi-occasion or carry it out.