Do you visit a grave? Do you have a tradition? Pebble on the headstone? Something else? I saw this yesterday, done precisely the same for each of 4 or 5 graves in a line:
A small fire had burnt out. Each grave had bright flowers, a peeled banana, an opened tinfoil packet of rice and some other food (possibly chicken), and an opened can of some drink that had what looked like corn pictured on it.
MEANWHILE: "Decorations can be an impediment to backhoes, and there are liability issues in tripping over candy canes."
MYSTERY SOLVED: The canned drink is Yeo's Soybean Milk.