I always ask for permission before I proceed to feed any food in taxi because it’s people’s car. My child has very bad motion sickness and I usually try to avoid feeding unless I have to for long journey (from east to west/jam). So far the taxi drivers are pretty nice and allowed and a few mentioned that they allowed because I asked them first. I will also assure them that I won’t leave any crumbs/mess (I use plastic bag to put on my LO’s lap and bring those snacks that don’t require breaking). And yes, according to CDG, no eating and drinking in taxi as crumbs do attract pest and since they are using the vehicle daily for long hours and picking up many people, they would naturally want to avoid having pest situation. (They also have to spend extra money to get rid of the pest/even get complaints from future passengers) In conclusion, we have to respect that it’s their vehicle so it’s best to ask them first instead. There are many understanding drivers out there :).