init python:
    class Parcel(object):
        """
        contents - Contents of the parcel, has to be a list of tuples
                   containing an item object and integer quantity [ (lollipop_ITEM, 5) ].
        wait - Wait time required for the item to be delivered.
        label - Call label called after the parcel was opened.
        func - A setup function called before the parcel contents is being shown to the player.

        Queue is universal for all instanced objects.
        """

        def __init__(self, contents, wait=1, label=None, func=None):
            self.mailed = False
            self.delivered = False
            self.contents = contents
            self.wait = wait
            self.label = label
            self.func = func

        @property
        def queue(self):
            return mailbox.parcels

        def send(self):
            self.mailed = True

            if not self in self.queue:
                self.queue.append(self)

        def open(self, silent=False):
            self.mailed = True
            self.delivered = True

            if self in self.queue:
                self.queue.remove(self)

            if self.func:
                self.func()

            for i in self.contents:
                item, quantity = i

                if isinstance(item, Item):
                    item.owned += quantity
                else:
                    item.unlock()

            if not silent:
                renpy.call("parcel", self, self.label)

        def type(self):
            return self.contents[0][0].type

        def get_caption(self):
            if len(self.contents) == 1:
                item, quantity = self.contents[0]

                if isinstance(item, Item):
                    icon = item.get_image()
                else:
                    icon = item.image

                if quantity == 1:
                    text = f"You have received one {item.name}."
                else:
                    text = f"You have received {num_to_word(quantity)} pieces of {item.name}."
            else:
                items = ", ".join(f"{x[1]} {x[0].name}" for x in self.contents)
                icon = "interface/icons/box_brown_"+str(random.randint(1, 4))+".webp"
                text = "You have received your ordered items:\n{size=-4}"+items+"{/size}"

            return (text, icon)

label parcel(parcel, lbl):
    show screen bld1
    show screen blktone

    $ renpy.checkpoint()

    call give_reward(*parcel.get_caption())

    hide screen blktone
    hide screen bld1
    with d3

    if lbl:
        call expression lbl

    return

label parcel_open_all:
    while mailbox.get_parcels():
        $ mailbox.get_parcels()[0].open()

    $ parcel_OBJ.hidden = True
    call tutorial("inventory")

    jump main_room_menu