Funnel for ethanol fireplace

In our town, a big hardware store is closing and so I got an ethanol fireplace from there for a really great price. It's a nice addition to our living room and makes it even more cosy. The only thing that annoys me is filling up the ethanol tank as it only has a rather small opening which makes it very hard not to spill the fluid all over the place.

So, I fired up the 3D printer and made a simple funnel which exactly fits onto the burner slit and makes filling up a breeze. As the burner is no