Our studded tumbler is made of food-grade vinyl acrylic which is unbreakable and durable, BPA FREE. Each one comes with reusable and eco-friendly straws. The cup lid has a buckle design to prevent the straw from falling off. Our 24oz water tumbler is the perfect size for everyday use and most Car Cupholders Friendly.With insulated double walls, it can insulate cold water. With thick acrylic walls and vacuum-sealed insulation, Our studded tumblers are in good rust resistance, durable and convenient to use, easy to clean. Keep your drink stays at the same temperature for hours, it is not recommended for hot drink. Our tumbler cups are BPA free and non-toxic. The blank circle is perfect for custom projects or your company logo and also for all events including birthdays, parties and so on.