Let me explain... this is a wire nut "housing" that will allow the use of a BALL Brand Reusable Aluminum 12oz cup. These cups are available everywhere and allow the user to take advantage of the cool 3D printed covers, without any of the safety concerns. These cups are reusable, washable, and recyclable. They essentially replace Red Solo cups that end up in land waste.

Buy the Aluminum Cups https://amzn.to/4hr9PlT (afflink)

If these are popular we can add 16oz and even 20oz ; we are not sure if other aluminum cups will work. I can guarantee that these cups fit PERFECTLY regardless of the material or printer.