This is more a concept then a usable thing. Hard to print and filament not water tight. I got the idea and designed this proof of concept.

I share it for you to have a go if you feel like it. The Chinese already stole it and you can by it now on TEMU or Ali, really!

The idea is that you put the inner cup into the outer cup. Fill the space in between with water, put in the freezer. When its frozen remove the inner shell, squeeze the cup and MAGIC!

--- 70 Ice cubes in a cup! ----

TIP: Also you can use it as a cooler for cans and bottles if you leave the inner cup inside!!

Please share your makes and I like getting a Like in return for my thing.

UPDATE 17-4-2018: The inner shell is now an inner Cup. First I was afraid that the cup would be pushed up by the water but the friction between both the cups should be enough to hold it down. Now there's no risk at leakage at the bottom. Then I aded horizontal channels between the ice cups so it will fill much easier and faster.

UPDATE 20-4-2018: Changed the top flat edge to 45 deg so you can print it without supports.... maybe is easier to fill also... Please note that I only updated the STL file.

Suggestions for improvement are more then welcome...