Customizable napkin holder

Size in customizer and print out to hold your napkins. STL is for standard paper napkins.
This component is part of an open source lab library, by the [Michigan Tech's Open Sustainability Technology Research Group](http://www.appropedia.org/Category:MOST).

For similar see the [Open-Source Lab How to Build Your Own Hardware and Reduce Research Costs](http://www.appropedia.org/Open-source_Lab)