Review on Hennaja Retainer Case: Durable, Slim Holder for Orthodontic Retainers - Ideal for Home, Office, and Travel - Conveniently Black and Blue by Carmen White

I got it as an additional case for Invisalign. In fact, it's slightly better than the official Invisalign case, which makes it very difficult for me to adjust my aligners. I find the aligners fit better because this body is square instead of round. The case stays closed too, it's nice and strong. It's not as thin as the official case if putting it in your pocket or purse is a problem, but still very compact. I will most likely buy another one. The case can also be used for any small storage as the internal divider can be taken out or left in depending on your needs.