I think you can be discreet, not like putting the snacks in their faces.
I went this week and took fruit and bottled water. No one checked.
it depends on who controls you
Yes you can
I brought some fruits and 4 bottles of water without any problem. It is not allowed to bring food to make a picnic.
Unless you have a doctor's notice that you can, you are not allowed to take in snacks and/or water.
No you cannot bring outside food or drink.
Thanks! Your answer is awaiting moderation.