Introduce the Distillery, a few recipes, and new chemicals. Introduce chemical patches, which apply on-touch chemicals, and can be dissolved a la pills.

code/modules/mob/_modifiers/medical.dm

@@ -0,0 +1,17 @@
+/*
+ * Modifiers caused by chemicals or organs specifically.
+ */
+
+/datum/modifier/cryogelled
+	name = "cryogelled"
+	desc = "Your body begins to freeze."
+	mob_overlay_state = "chilled"
+
+	on_created_text = "<span class='danger'>You feel like you're going to freeze! It's hard to move.</span>"
+	on_expired_text = "<span class='warning'>You feel somewhat warmer and more mobile now.</span>"
+	stacks = MODIFIER_STACK_ALLOWED
+
+	slowdown = 0.1
+	evasion = -5
+	attack_speed_percent = 1.1
+	disable_duration_percent = 1.05