I own and personally tested the Tesyker Family Set of solar eclipse glasses, which is a good option if you’re buying for your loved ones and prefer hard plastic glasses over more fragile cardboard ones. The set comes with two pairs each of adult-sized and child-sized plastic glasses, as well as two paper pairs.
Their polymer lenses are ISO 12312-2 certified and filter 100 percent of UV and infrared light. Tesyker is one of the brands tested and approved by the American Astronomical Society, but I can also confirm the efficacy of their plastic-framed viewers based on my own hands-on testing, which included staring up at the hot Los Angeles sun from a wide-open parking lot. The glasses filtered out all light except for the sun itself, and its orange surface was clear and easy to see.
However, the included paper glasses did not work sufficiently — the sun was noticeably brighter, and after just a few seconds it was too hard to look at. My vision was blurred from the sun damage for nearly an hour afterward, making it clear the lenses are not strong enough for viewing the solar eclipse and are basically worthless. As long as you toss out the paper glasses that come with the set, you can still use the included plastic frames, which felt comfortable to wear and fully covered both of my eyes. I don’t regret the purchase, considering I prefer the plastic frames anyway, but this could be a dealbreaker for you and your family. You can find the Tesyker Family Set on Amazon for $29.99.