Well, it honestly depends on what they like.
For example say your grandfather passed away and you went to visit his grave ever year, as an offering of peace and gratitude you bring his favorite alcohol or beverage and either drink it while dumping his portion at the foot of the grave. (Make sure your of age first lol)
Now if it were me, I would want whoever you simply bring me some milk and books and I'll be fine, especially yaoi! (˵ ͡° ͜ʖ ͡°˵)