This unique mug allows you to personalize your own colorful pattern with the included food-safe markers. You can make your designs permanent by cooking in a 375-degree oven for 40 minutes. The mug features the "perfect" lid with three rings of silicone to ensure no leaks. The doubled lip plastic ensures a tight fit at the top and fits 1.5 inches into the cup's molded grooves for true security. The pop-top attachment provides security, insulation and a comfortable place to sip your coffee. Holds 17 oz. Top-rack dishwasher safe and microwaveable. Packaged in a coordinating gift box.