B&H Photo Video offers the Solar Eclipse Viewing Glasses 5-Pack for $4.99 with free shipping. That's $3 under the lowest price we could find for this quantity of similar glasses, although we saw these for a buck less two weeks ago. Features include 100% UV and IR radiation protection and blocks 99.999% of intense visible light.

Note that on August 21, a solar eclipse will be visible throughout the United States (weather permitting).