Tips for solar eclipse glasses still in good condition:
A) store them safely and reuse them
the glasses will last for years of solar viewing and can be saved for the April 2024 solar eclipse
B) donate them
Astronomers Without Borders is collecting and distributing glasses to locations in South America and Asia when eclipses cross those continents in 2019 - learn how to donate your glasses
C) recycle
you can recycle the paper card stock frames by removing the filter lenses