If you still have them laying around, feel free to bring them in to our office and donate them to a good cause. Tigard Eyecare has joined Astronomers Without Borders as a collection site for used eclipse glasses. Astronomers Without Borders collects them to give out to schools in Asia and South America for the eclipse that will happen there in 2019. Your discarded glasses can help a student half a planet away!
https://astronomerswithoutborders.org/awb-programs/resource-sharing-programs/eclipse-glasses-donation-program.html