diff --git a/code/datums/storage/subtypes/backpack.dm b/code/datums/storage/subtypes/backpack.dm
index a2a1a13fcd4..af0c27a9606 100644
--- a/code/datums/storage/subtypes/backpack.dm
+++ b/code/datums/storage/subtypes/backpack.dm
@@ -16,3 +16,17 @@
 	max_total_storage = 60
 	max_slots = 21
 	max_specific_storage = WEIGHT_CLASS_NORMAL
+
+/datum/storage/backpack/messenger
+	max_total_storage = 16
+	max_slots = 16
+
+/datum/storage/backpack/messenger/New(
+	atom/parent,
+	max_slots,
+	max_specific_storage,
+	max_total_storage,
+)
+	. = ..()
+	var/static/list/exception_cache = typecacheof(list(/obj/item/fish_tank))
+	exception_hold = exception_cache
diff --git a/code/game/objects/items/storage/backpack.dm b/code/game/objects/items/storage/backpack.dm
index 1de9b7731ff..4b03a3adca2 100644
--- a/code/game/objects/items/storage/backpack.dm
+++ b/code/game/objects/items/storage/backpack.dm
@@ -19,7 +19,7 @@
 	lefthand_file = 'icons/mob/inhands/equipment/backpack_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/backpack_righthand.dmi'
 	w_class = WEIGHT_CLASS_BULKY
-	slot_flags = ITEM_SLOT_BACK //ERROOOOO
+	slot_flags = ITEM_SLOT_BACK
 	resistance_flags = NONE
 	max_integrity = 300
 	storage_type = /datum/storage/backpack
@@ -819,6 +819,8 @@
 	worn_icon = 'icons/mob/clothing/back/backpack.dmi'
 	lefthand_file = 'icons/mob/inhands/equipment/backpack_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/backpack_righthand.dmi'
+	slot_flags = ITEM_SLOT_BACK|ITEM_SLOT_BELT
+	storage_type = /datum/storage/backpack/messenger
 
 /obj/item/storage/backpack/messenger/eng
 	name = "industrial messenger bag"