It is a kind of resin sand timer. The lids are made of resin.
We make it like a piece of watermelon. You can customize other kinds of fruit sand timer.
The bulbs are glass, and there is a clear acrylic tube outside to protect them.
Even you carelessly drop it on the ground, it will not break.
Kids like the sand timers very much. So we need to make sure that they are safe enough.
The size of it is Dia60×132mm. And this is a great size for kids.
The time is available from 30 seconds to 30 minutes.