diff --git a/code/modules/reagents/reagent_containers.dm b/code/modules/reagents/reagent_containers.dm
index afc93a99b4..45cf95dacb 100644
--- a/code/modules/reagents/reagent_containers.dm
+++ b/code/modules/reagents/reagent_containers.dm
@@ -16,7 +16,7 @@
 	var/spawned_disease = null
 	var/disease_amount = 20
 	var/spillable = FALSE
-	var/beaker_resistances |= 1<<3
+	var/beaker_resistances |= (1<<3)
 
 /obj/item/reagent_containers/Initialize(mapload, vol)
 	. = ..()
@@ -131,7 +131,7 @@
 //melts plastic beakers
 /obj/item/reagent_containers/microwave_act(obj/machinery/microwave/M)
 	reagents.expose_temperature(1000)
-	if(!beaker_resistances = FLAG_STATUS_TEMP_IMMUNE)
+	if(!beaker_resistances == FLAG_STATUS_TEMP_IMMUNE)
 		var/list/seen = viewers(5, get_turf(src))
 		var/iconhtml = icon2html(src, seen)
 		for(var/mob/H in seen)
@@ -143,7 +143,7 @@
 //melts plastic beakers
 /obj/item/reagent_containers/temperature_expose(datum/gas_mixture/air, exposed_temperature, exposed_volume)
 	reagents.expose_temperature(exposed_temperature)
-	if(!beaker_resistances = FLAG_STATUS_TEMP_IMMUNE)
+	if(!beaker_resistances == FLAG_STATUS_TEMP_IMMUNE)
 		if(reagents.chem_temp > 444)//assuming polypropylene
 			var/list/seen = viewers(5, get_turf(src))
 			var/iconhtml = icon2html(src, seen)
@@ -154,7 +154,7 @@
 
 //melts glass beakers
 /obj/item/reagent_containers/proc/pH_check()
-	if(!beaker_resistances = FLAG_STATUS_PH_IMMUNE)
+	if(!beaker_resistances == FLAG_STATUS_PH_IMMUNE)
 		if((reagents.pH < 0.5) || (reagents.pH > 13.5))
 			var/list/seen = viewers(5, get_turf(src))
 			var/iconhtml = icon2html(src, seen)
diff --git a/code/modules/reagents/reagent_containers/bottle.dm b/code/modules/reagents/reagent_containers/bottle.dm
index d9ee228228..249ed56d20 100644
--- a/code/modules/reagents/reagent_containers/bottle.dm
+++ b/code/modules/reagents/reagent_containers/bottle.dm
@@ -7,8 +7,6 @@
 	item_state = "atoxinbottle"
 	possible_transfer_amounts = list(5,10,15,25,30)
 	volume = 30
-	temp_immune = TRUE //required so that things don't melt when you dispence them in the chem_master.
-	pH_immune = TRUE
 
 
 /obj/item/reagent_containers/glass/bottle/Initialize()
diff --git a/code/modules/reagents/reagent_containers/glass.dm b/code/modules/reagents/reagent_containers/glass.dm
index 76bae38750..83a9b81884 100644
--- a/code/modules/reagents/reagent_containers/glass.dm
+++ b/code/modules/reagents/reagent_containers/glass.dm
@@ -113,7 +113,7 @@
 	icon_state = "beaker"
 	item_state = "beaker"
 	materials = list(MAT_GLASS=500)
-	pH_immune = FALSE
+	beaker_resistances &= ~FLAG_STATUS_PH_IMMUNE
 
 /obj/item/reagent_containers/glass/beaker/Initialize()
 	. = ..()
@@ -165,7 +165,7 @@
 	volume = 100
 	amount_per_transfer_from_this = 10
 	possible_transfer_amounts = list(5,10,15,20,25,30,50,100)
-	pH_immune = FALSE
+	beaker_resistances &= ~FLAG_STATUS_PH_IMMUNE
 
 /obj/item/reagent_containers/glass/beaker/plastic
 	name = "x-large beaker"
@@ -175,8 +175,8 @@
 	volume = 150
 	amount_per_transfer_from_this = 10
 	possible_transfer_amounts = list(5,10,15,20,25,30,50,100,150)
-	temp_immune = FALSE
-	pH_immune = TRUE
+	beaker_resistances &= ~FLAG_STATUS_TEMP_IMMUNE
+	beaker_resistances |= FLAG_STATUS_PH_IMMUNE
 
 /obj/item/reagent_containers/glass/beaker/plastic/update_icon()
 	icon_state = "beakerlarge" // hack to lets us reuse the large beaker reagent fill states
@@ -191,8 +191,7 @@
 	volume = 200
 	amount_per_transfer_from_this = 10
 	possible_transfer_amounts = list(5,10,15,20,25,30,50,100,200)
-	temp_immune = TRUE
-	pH_immune = TRUE
+	beaker_resistances |= (1<<3)
 
 /obj/item/reagent_containers/glass/beaker/noreact
 	name = "cryostasis beaker"
@@ -202,8 +201,7 @@
 	materials = list(MAT_METAL=3000)
 	volume = 50
 	amount_per_transfer_from_this = 10
-	temp_immune = TRUE
-	pH_immune = TRUE
+	beaker_resistances |= (1<<3)
 
 /obj/item/reagent_containers/glass/beaker/noreact/Initialize()
 	. = ..()
@@ -219,7 +217,7 @@
 	volume = 300
 	amount_per_transfer_from_this = 10
 	possible_transfer_amounts = list(5,10,15,20,25,30,50,100,300)
-	pH_immune = FALSE
+	beaker_resistances &= ~FLAG_STATUS_PH_IMMUNE
 
 /obj/item/reagent_containers/glass/beaker/cryoxadone
 	list_reagents = list("cryoxadone" = 30)
@@ -276,7 +274,7 @@
 		SLOT_L_STORE, SLOT_R_STORE,\
 		SLOT_GENERC_DEXTROUS_STORAGE
 	)
-	pH_immune = FALSE
+	beaker_resistances &= ~FLAG_STATUS_PH_IMMUNE
 
 /obj/item/reagent_containers/glass/bucket/attackby(obj/O, mob/user, params)
 	if(istype(O, /obj/item/mop))
@@ -326,8 +324,8 @@
 	materials = list(MAT_GLASS=0)
 	volume = 50
 	amount_per_transfer_from_this = 10
-	pH_immune = FALSE
-	temp_immune = FALSE
+	beaker_resistances &= ~FLAG_STATUS_PH_IMMUNE
+	beaker_resistances &= ~FLAG_STATUS_TEMP_IMMUNE
 
 /obj/item/reagent_containers/glass/beaker/waterbottle/empty
 	list_reagents = list()
@@ -339,8 +337,8 @@
 	list_reagents = list("water" = 100)
 	volume = 100
 	amount_per_transfer_from_this = 20
-	pH_immune = FALSE
-	temp_immune = FALSE
+	beaker_resistances &= ~FLAG_STATUS_PH_IMMUNE
+	beaker_resistances &= ~FLAG_STATUS_TEMP_IMMUNE
 
 /obj/item/reagent_containers/glass/beaker/waterbottle/large/empty
 	list_reagents = list()