Fully functional

code/game/objects/items/storage/fancy.dm

@@ -17,9 +17,6 @@
 
 /obj/item/storage/fancy
 	icon = 'icons/obj/food/containers.dmi'
-	icon_state = "donutbox6"
-	name = "donut box"
-	desc = "Mmm. Donuts."
 	resistance_flags = FLAMMABLE
 	var/icon_type = "donut"
 	var/spawn_type = null
@@ -59,18 +56,22 @@
 	fancy_open = TRUE
 	update_icon()
 
+#define DONUT_INBOX_SPRITE_WIDTH 3
+
 /*
  * Donut Box
  */
 
 /obj/item/storage/fancy/donut_box
-	icon = 'icons/obj/food/containers.dmi'
-	icon_state = "donutbox6"
-	icon_type = "donut"
 	name = "donut box"
+	desc = "Mmm. Donuts."
+	icon = 'icons/obj/food/donut.dmi'
+	icon_state = "donutbox_inner"
+	icon_type = "donut"
 	spawn_type = /obj/item/reagent_containers/food/snacks/donut
 	fancy_open = TRUE
 	custom_price = PRICE_NORMAL
+	appearance_flags = KEEP_TOGETHER
 
 /obj/item/storage/fancy/donut_box/ComponentInitialize()
 	. = ..()
@@ -78,6 +79,36 @@
 	STR.max_items = 6
 	STR.can_hold = typecacheof(list(/obj/item/reagent_containers/food/snacks/donut))
 
+/obj/item/storage/fancy/donut_box/PopulateContents()
+	. = ..()
+	update_icon()
+
+/obj/item/storage/fancy/donut_box/update_icon_state()
+	if(fancy_open)
+		icon_state = "donutbox_inner"
+	else
+		icon_state = "donutbox"
+
+/obj/item/storage/fancy/donut_box/update_overlays()
+	. = ..()
+
+	if (!fancy_open)
+		return
+
+	var/donuts = 0
+
+	for (var/_donut in contents)
+		var/obj/item/reagent_containers/food/snacks/donut/donut = _donut
+		if (!istype(donut))
+			continue
+
+		. += image(icon = initial(icon), icon_state = donut.in_box_sprite(), pixel_x = donuts * DONUT_INBOX_SPRITE_WIDTH)
+		donuts += 1
+
+	. += image(icon = initial(icon), icon_state = "donutbox_top")
+
+#undef DONUT_INBOX_SPRITE_WIDTH
+
 /*
  * Egg Box
  */