400€ isn’t a bargain if you ask me. There are totally capable smartphones for under 200€ these days. I’m using a Motorola G15 for 160€ right now. It has a headphone jack.

It’s very bad scientific practice to eat anything in the lab. In this case it is also a bad idea because the clean up often uses nasty chemicals that are very much unsafe to eat. However if the clean up worked as the company wanted it to, its save. Single cells are externally vulnerable and thrive in this stuff. Your digestive system is a wonder of bio chemistry and will most likely show no sign of irritation.