[dctoedt]

This suggests a "knife skills" automatic habit to cultivate:† Whenever opening anything, point it away from your face, or at least move your face out of the line of fire. (Champagne, soda bottles, whatever.)

† "Knife skills" automatic habits = things such as, • always cut away from yourself; • whenever holding something down with the non-knife hand to be cut, curl that hand's fingers under, so that the non-knife hand's knuckles serve as a guard for that hand's finger tips.

[fuzzfactor]

I would say this is a big factor for Thermos.

with Champagne the injuries are probably more numerous, but this risk is part of the expected behavior.