This coffee mug features thermal color changing technology that creates beautiful gradients effects when fill with hot drinks, adding fun and creativity to your daily beverages Make of synthetic resin that ' s 30% more impacts resistant than ceramic, this mug safely holds hot liquids while being ideal for home or offices use The smooth synthetic resin surfaces allows for effortless hand washing or dishwasher cleaning, making it perfect for busy lifestyles while maintaining its stylish appearance Perfect for coffee, tea, hot chocolate or milk, this cup enhances visual enjoyment during family gatherings, offices breaks, or as a unique special occasions With its heart shape and magical color changing effect, this mug serves as an expressive Valentine ' s Day, birthday or anniversary present for couples and friend seeking creative gifts