If you want to buy durable eyeglasses, you can buy it from some exclusive store of eyeglasses, you may also get some free glasses some where. However, if it is not for free, you can go to the online store and have a look. The price must be relatively cheaper than those in the franchise stores.
As a matter of fact, there are a lot of places that you can find cheap glasses cases available. For example, online stores provide customers with lots of glasses cases of various types and colors and qualities. But only a glasses case is not worth buying from the Internet, too complicated, don't you think so? But, you can also find cheap cases in some glasses stores in the neighborhood, and usually they will only cost you a couple of bucks, really a bargain, isn't it? Now, go and find your kid a nice glasses case.