This is a small product to extract juice off a lemon. It is a common thing sold everywhere and mine is a similar one. It works fine.
for the ones who want to print and use the thingy, here is the download link :Lemon Juice Thingy STL file (553)
If you don’t have a 3D printer, here is the link of the product in shapeways.com from where you can order a 3D print online for 12€ only.