Description: Premium Materials: This insulated water cup is crafted with a combination of 304 and 316 stainless steel for the inner lining, ensuring durability and security. The lid is made from food grade PP, and the straw features food grade silicone, making it safe for everyday useCapacity: With a generous capacity of 500 mL, this insulated water bottle is great for keeping you hydrated throughout the day. Its compact size (8.8 cm x 21 cm) makes it easy to carry around without taking up too much spaceEfficient Insulation: Designed to keep your beverage at the desired temperature, this portable water bottle can maintain hot drinks for approximately 8 hours and keep ice intact for about 6 hours, making it ideal for both hot summer days and chilly winter morningsConvenient Design: Featuring a wide mouth with a diameter of 4.5 cm, this water drinking bottle allows easy filling and cleaning. The included strap makes it convenient to carry on the go, whether you're heading to school or an outdoor adventureComplete Package: Along with the insulated cup itself, you'll receive thoughtful extras including a carrying strap, a cleaning brush for easy maintenance, and fun stickers to personalize your cup as you like Specification: Material: Stainless Steel, PP, Silicone Size Chart: 8.8cmx21cm/3.46inchx8.27inchCup Mouth:4.5cm/1.77inch Package Includes: 1Insulated Water Bottle1 Shoulder Strap1 Cleaning BrushStickers Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.