I think it’s the collection of nearly empty bottles? Like, imagine a home fridge with just like 10 nearly, but not quite, empty bottles of ketchup.

Probably.

Good news, looks like they have an app that you can check and see which bars to avoid! Hahaha

Gross

In my experience yes, but some planes ive notice they turn back on each time there is an announcement, so depending on how many it can be annoying. Eother way advertising is a cancer that plagues our lives more and more.