[Pontiac]

Whiskey or rum and perhaps fruit and produce.

Rum is probably more correct. If they are really trying to get something from the dead their would be chicken blood and feathers as well. (Maybe some salt if they are trying to confine the sprit. But that does not appear to be the case here.)

[mtbopfuyn]

No, I didn't see any evidence of that. The cemetery is kept neat which is why the beer bottles seemed out of place.