They are a bit flimsy but seem as well constructed as possible. They have fallen apart after a short time with very minimal use.
Considering their short lifetime, they aren't very cheap. Even considering the charitable aspect to the company, they should be much cheaper since they are made in China where there are questionable labor and environmental practices. If you want to give to charity, buy from a company who uses production methods that you can be sure of, and then give the extra money to a charity that you have researched. Don't simply accept this company's advertising strategy and think you are being beneficent.