it's also one of the customs to send parcels to relatives or friends before Idul Fitri
in Bahasa). but the above picture is not the regular kind of parcels. it's actually part of the tidings or zakat
for the muslims to give to the unfortunate ones. usually, zakat can be given in the form of cash, directly to the unfortunate ones. but it's also common to give them in the form of basic needs, such as pack of rice, sugar, fry oil, soy sauce, milk, etc.
due to the rise of prices before Idul Fitri, they usually unable to buy them in large amounts, sometimes they just cannot afford to buy them at all. getting them as gifts like these would really useful to lighten up their burden before Idul Fitri and they can celebrate it like other families.