Almost always upright. I haven't broken a pair in years so I bought some really expensive ones recently. And prescription sunglasses. 



https://twitter.com/gedankenstuecke/status/818026481146331136 …
Ah that explains a lot. Still pretty good. Oh and I lost one in the sea. 
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none broken during the drunken early 20s, that must count for something
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only broke a single pair so far. Ironically while putting it in the transport case…