Foam cup holder w lid
thingiverse
Foam Cup Holder Similar to a beer stein, this lid will shield your preferred beverage from the elements, garden critters, dirt, and fruit flies etc. As an added bonus, coffee stays hotter longer. In one test starting at 167 F, after 10 minutes the temperature dropped only 14 degrees to 153 F. Without a lid it fell 29 degrees to 138 F. The foam cup is a Walmart packaged "Great Value" brand marked as an 8.5 fl oz cup but probably an 8 ounce. Another cup may fit this holder, however it's unlikely to be a good tight fit. Then again some judicious scaling may allow another size cup to fit. Metric files are provided along with a southpaw file for left-handers.
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