My dad once felt a sneeze coming while brushing teeth. He tried to suppress it and closed his mouth, resulting in a mouthful of minty toothpaste pressure-washing his nose.

He didn’t recommend this experience at all, besides the burning agony that lasted quite a while, crumbs of dry toothpaste kept falling out of his nose for like a week sporadically.

Or press the tip of your tongue very firmly against the roof of your mouth. Helps me mitigate sneezes

It would literally have cost you nothing not to write that sentence down… but here we are

Yeah, iirc TetraPak advertised as being an eco-friendly packaging and was prohibited to do so (at least in some countries, dunno) exactly because of that.