You certainly know this situation: At the stand-up party you hold a glass in your right hand and the snacks plate in your left - and all of a sudden you have to sneeze.

This glass holder keeps your sleeve clean, your wine glass full and your conversational partners healthy. 

I prepared separate .stl files for right-handers and left-handers. 

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As always I include the OpenSCAD source files for you to adapt or improve:

• Download and install OpenSCAD from https://www.openscad.org
• Launch OpenSCAD and open the enclosed OpenSCAD source file (/File/Open).
• Amend the parameters at the top of the file and/or modify the source code.
• Save your changes (/File/Save).
• Render the design (/Design/Render).
• Export the rendered design e.g. as a .stl file (/File/Export/Export as STL).
• Slice and print.

See my other designs at
https://www.thingiverse.com/thinger13/designs