The 375 ml Ellipse insulated mug is made of durable stainless steel and is perfect for life on the go. It keeps drinks hot for up to 4 hours or cold for up to 8 hours, making it ideal for both your morning coffee and refreshing cold drinks. The mug is 100% leak-proof, fits in almost any cup holder, and is BPA-free for safe everyday use. Handwash is recommended to maintain its finish.