Direction is relative. Gravity on earth it’s easy since we all have the same down. But in space you just orient on whatever you can to describe your frame of reference.

To answer your question: I switched to Oxo brand and those are pretty solid.

I’m not sure about the specifics but I’m fairly certain that the Pyrex brand has taken a bit of a hit and quality like that with a change the chemical composition of their glassware a while back.