One of the things that everyone should have personally, whether at home or at work is a MUG.
Mugs are one of the necessary objects in any society that everyone should have. To encourage people into buying mugs for themselves and their children, you could design different mugs.
Different colors, unique designs, new sizes and etc. This way, in addition to use a personal mug, every time the person sees the mug, it will make him/her feel good.