People need to stop doing inversions. At some point you are going to spill it and now we have good valve based options its not even necessary to stop the tiny amount of dripping that occurs. Even before we had the several valve solutions the amount that actually dripped through was tiny and had no impact on the flavour of the cup of coffee since you could put the plunger in and create a slight negative pressure that kept the liquid in.

James Hoffman taste tested this and couldn't tell the difference, he has a fantastic video on what is actually worth doing and what isn't with the Aeropress and inversion isn't.