The most famous brand is Silhouette from Austria, you can buy them on the internet. It is true that frameless glasses
can get broken easily. But if you take good care of them, it may not gonna happened. I can give you some tips. Firstly, don't use just one hand when taking off or take on them. put them in the box if you intend to not to use them. Secondly, use soft cloth not something hard to clean them. Thirdly, check them offer, if the screw are loose, take them to the shop and let shop assistant help you to repair it. What is more, far away palaces with high temperature like stove, and never wear them when you are take a bath, especially sauna. hope my answer can help you.