Magic Color-changing Bonechina Growing Old Couple Morning Mug with a Ceramic Spoon for Coffee Tea Milk ,Heat Sensitive Growing old couple Morning coffee mug are made of high quality new BoneChina When cold:a sweet young couple are enjoying their youth;when you put hot water which temperature is above 60,you can see the color is changing,they are growing old,but still come along together,what a romantic life we want to encounter. The coffee mug can make you happy,give you an amazing surprise,enjoy your life. This is a mug about temperature and love.Slowly add hot water/hot milk/coffee to the mug,you will see a pair of lovers' life from young to old.Spending a lifetime loving you.Growing old with your lover is the most romantic thing in our life. For coffee,tea and hot chocolate,share with your family and your lover.