This perfect everyday mug is strong enough for hiking and sleek enough for in the office. The bamboo gives a timeless look and comfortable grip. With 1 handed drinking and lockable leakproof lid. 304 stainless steel outside wall and 201 stainless steel inside. Keep your drinks hot for up to 5h and cold for up to 15h with this vacuum insulated mug. Content: 450 ml. Registered design??