what is allowed to be brought into park for those having outfield lawn general admission tickets? (i.e. chairs, blankets, snacks, bottled waters?)

Blankets unopened water bottles

We brought sandwiches and unopened bottle water. All seating areas allow some food to be brought into the stadium. As expensive as food is there it is better to bring food from home.

Just like TSA at the airport

You can bring drinks in a plastic bottle that have not been opened. Cannot bring anything aerosol