Jfc that's a lot of work!

code/modules/reagents/reagent_dispenser.dm

@@ -8,7 +8,7 @@
 	pressure_resistance = 2*ONE_ATMOSPHERE
 	max_integrity = 300
 	var/tank_volume = 1000 //In units, how much the dispenser can hold
-	var/reagent_id = "water" //The ID of the reagent that the dispenser uses
+	var/reagent_id = /datum/reagent/water //The ID of the reagent that the dispenser uses
 
 /obj/structure/reagent_dispensers/take_damage(damage_amount, damage_type = BRUTE, damage_flag = 0, sound_effect = 1, attack_dir)
 	. = ..()
@@ -58,7 +58,7 @@
 	name = "firefighting foam tank"
 	desc = "A tank full of firefighting foam."
 	icon_state = "foam"
-	reagent_id = "firefighting_foam"
+	reagent_id = /datum/reagent/firefighting_foam
 	tank_volume = 500
 
 /obj/structure/reagent_dispensers/water_cooler
@@ -99,7 +99,7 @@
 	name = "fuel tank"
 	desc = "A tank full of industrial welding fuel. Do not consume."
 	icon_state = "fuel"
-	reagent_id = "welding_fuel"
+	reagent_id = /datum/reagent/fuel
 
 /obj/structure/reagent_dispensers/fueltank/high //Unused - Good for ghost roles
 	name = "high-capacity fuel tank"
@@ -136,12 +136,12 @@
 
 /obj/structure/reagent_dispensers/fueltank/attackby(obj/item/I, mob/living/user, params)
 	if(istype(I, /obj/item/weldingtool))
-		if(!reagents.has_reagent("welding_fuel"))
+		if(!reagents.has_reagent(/datum/reagent/fuel))
 			to_chat(user, "<span class='warning'>[src] is out of fuel!</span>")
 			return
 		var/obj/item/weldingtool/W = I
 		if(!W.welding)
-			if(W.reagents.has_reagent("welding_fuel", W.max_fuel))
+			if(W.reagents.has_reagent(/datum/reagent/fuel, W.max_fuel))
 				to_chat(user, "<span class='warning'>Your [W.name] is already full!</span>")
 				return
 			reagents.trans_to(W, W.max_fuel)
@@ -171,7 +171,7 @@
 	icon_state = "pepper"
 	anchored = TRUE
 	density = FALSE
-	reagent_id = "condensedcapsaicin"
+	reagent_id = /datum/reagent/consumable/condensedcapsaicin
 
 /obj/structure/reagent_dispensers/peppertank/Initialize()
 	. = ..()
@@ -191,7 +191,7 @@
 	desc = "A huge metal vat with a tap on the front. Filled with cooking oil for use in frying food."
 	icon_state = "vat"
 	anchored = TRUE
-	reagent_id = "cooking_oil"
+	reagent_id = /datum/reagent/consumable/cooking_oil
 
 ////////
 //Kegs//
@@ -201,7 +201,7 @@
 	name = "beer keg"
 	desc = "Beer is liquid bread, it's good for you..."
 	icon_state = "beer"
-	reagent_id = "beer"
+	reagent_id = /datum/reagent/consumable/ethanol/beer
 
 /obj/structure/reagent_dispensers/beerkeg/blob_act(obj/structure/blob/B)
 	explosion(src.loc,0,3,5,7,10)
@@ -213,42 +213,41 @@
 	desc = "A keg."
 	icon = 'modular_citadel/icons/obj/objects.dmi'
 	icon_state = "keg"
-	reagent_id = "water"
 
 /obj/structure/reagent_dispensers/keg/mead
 	name = "keg of mead"
 	desc = "A keg of mead."
 	icon_state = "orangekeg"
-	reagent_id = "mead"
+	reagent_id = /datum/reagent/consumable/ethanol/mead
 
 /obj/structure/reagent_dispensers/keg/aphro
 	name = "keg of aphrodisiac"
 	desc = "A keg of aphrodisiac."
 	icon_state = "pinkkeg"
-	reagent_id = "aphro"
+	reagent_id = /datum/reagent/drug/aphrodisiac
 	tank_volume = 150
 
 /obj/structure/reagent_dispensers/keg/aphro/strong
 	name = "keg of strong aphrodisiac"
 	desc = "A keg of strong and addictive aphrodisiac."
-	reagent_id = "aphro+"
+	reagent_id = /datum/reagent/drug/aphrodisiacplus
 	tank_volume = 120
 
 /obj/structure/reagent_dispensers/keg/milk
 	name = "keg of milk"
 	desc = "It's not quite what you were hoping for."
 	icon_state = "whitekeg"
-	reagent_id = "milk"
+	reagent_id = /datum/reagent/consumable/milk
 
 /obj/structure/reagent_dispensers/keg/semen
 	name = "keg of semen"
 	desc = "Dear lord, where did this even come from?"
 	icon_state = "whitekeg"
-	reagent_id = "semen"
+	reagent_id = /datum/reagent/consumable/semen
 
 /obj/structure/reagent_dispensers/keg/gargle
 	name = "keg of pan galactic gargleblaster"
 	desc = "A keg of... wow that's a long name."
 	icon_state = "bluekeg"
-	reagent_id = "gargleblaster"
+	reagent_id = /datum/reagent/consumable/ethanol/gargle_blaster
 	tank_volume = 100