'Papa' 'Mama' Mug Set Lovely Gift

My parents-in-law have been expecting their grandchildren from us since we got married. But since we havent gifted with any children, they still support us and they understand this. In fact, they support in our efforts for getting pregnant. We understand that they want grandchildren so bad, because they gave us these mugs as our wedding gift. These mugs, as you can see, are a pair written Papa and Mama. They are made by Onoki, and from ceramic. The ornament is of beautiful yellow flower. The overall color is white, and the ceramic material seems pretty solid for hot boiling water. We love it and still keep the box too. I think we have used it several times, and not often. These mugs are perfect for drinking tea or coffee, especially if we want larger portion since they are quite big for mugs. But sometimes the tea or coffee left a stain on the bottom part, and I just got realized this recently. I should get it washed once we finished drinking to avoid this being stained. When we drink with these mugs, we would read the Papa and Mama writing, and it somehow encourages us to do more efforts in getting pregnant :) We LOVE these!