Great question! I did do a bit of QA myself: dishwasher cycles; hot & cold liquids (a good test of borosilicate glass); drop tests from very low heights (it is

Great question! I did do a bit of QA myself: dishwasher cycles; hot & cold liquids (a good test of borosilicate glass); drop tests from very low heights (it is glass after all). Most factories worth their salt also undergo some third party testing and I asked for these certificates which detail the chemical breakdown of the glass. Granted, I suppose these could be forged, and I would have no way of knowing. Finally, there is quite a lot of back and forth with videos on Whatsapp, where you see the factory floor, and get a sense of the type of show they're running. Part of the down-selection process is also just how willing each factory is to engage with these types of questions!