It is a kind of resin sand timer. The lids are made of resin.
We make it like a piece of wiki fruit. 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.
Because these kinds of sand timers are usually for kids and students. So we need to make sure that they are safe enough.
The size of it is Dia60×132mm. It is a lovely size for kids.