diff --git a/assets/meshes/big_flask.res b/assets/meshes/big_flask.res
index bc11be8..d06a05d 100644
Binary files a/assets/meshes/big_flask.res and b/assets/meshes/big_flask.res differ
diff --git a/assets/meshes/big_flask_fill.res b/assets/meshes/big_flask_fill.res
index 47c8621..4ed9f92 100644
Binary files a/assets/meshes/big_flask_fill.res and b/assets/meshes/big_flask_fill.res differ
diff --git a/assets/meshes/jar.res b/assets/meshes/jar.res
index c6ca6a6..be21305 100644
Binary files a/assets/meshes/jar.res and b/assets/meshes/jar.res differ
diff --git a/assets/meshes/jar_fill.res b/assets/meshes/jar_fill.res
index 66a9553..a4665cc 100644
Binary files a/assets/meshes/jar_fill.res and b/assets/meshes/jar_fill.res differ
diff --git a/assets/meshes/spoon.res b/assets/meshes/spoon.res
index 0cb4bd3..f9c0e49 100644
Binary files a/assets/meshes/spoon.res and b/assets/meshes/spoon.res differ
diff --git a/assets/meshes/spoon_fill.res b/assets/meshes/spoon_fill.res
index dbe22f0..cc590af 100644
Binary files a/assets/meshes/spoon_fill.res and b/assets/meshes/spoon_fill.res differ
diff --git a/assets/models/Chemistry.glb.import b/assets/models/Chemistry.glb.import
index d2bffdb..33b7fae 100644
--- a/assets/models/Chemistry.glb.import
+++ b/assets/models/Chemistry.glb.import
@@ -83,7 +83,7 @@ _subresources={
 "generate/shadow_meshes": 0,
 "lods/normal_merge_angle": 20.0,
 "save_to_file/enabled": true,
-"save_to_file/fallback_path": "res://assets/meshes/Chemistry_Sphere_003.res",
+"save_to_file/fallback_path": "res://assets/meshes/big_flask_fill.res",
 "save_to_file/path": "uid://q71x8vx4dkis"
 },
 "Chemistry_Sphere_004": {
@@ -92,7 +92,7 @@ _subresources={
 "generate/shadow_meshes": 0,
 "lods/normal_merge_angle": 20.0,
 "save_to_file/enabled": true,
-"save_to_file/fallback_path": "res://assets/meshes/Chemistry_Sphere_004.res",
+"save_to_file/fallback_path": "res://assets/meshes/big_flask.res",
 "save_to_file/path": "uid://bsigmbc20m6pn"
 },
 "Chemistry_Sphere_005": {
@@ -101,7 +101,7 @@ _subresources={
 "generate/shadow_meshes": 0,
 "lods/normal_merge_angle": 20.0,
 "save_to_file/enabled": true,
-"save_to_file/fallback_path": "res://assets/meshes/Chemistry_Sphere_005.res",
+"save_to_file/fallback_path": "res://assets/meshes/spoon_fill.res",
 "save_to_file/path": "uid://n4ibk6y8t7h3"
 }
 }
diff --git a/src/inventory.gd b/src/inventory.gd
index 59bef4f..d8c1651 100644
--- a/src/inventory.gd
+++ b/src/inventory.gd
@@ -108,4 +108,7 @@ func recalculate_temperature() -> void:
 	mean_temperature = temperature_sum / len(inventory)
 
 func check_for_reactions() -> void:
-	pass
+	print(ReactionRegistry.find_appropriate_reaction(inventory.values().map(runtime_to_substance),mean_temperature))
+
+func runtime_to_substance(sub: RuntimeSubstanceData) -> Substance:
+	return sub.substance
diff --git a/src/reaction_registry.gd b/src/reaction_registry.gd
index fd89583..da28d9f 100644
--- a/src/reaction_registry.gd
+++ b/src/reaction_registry.gd
@@ -8,7 +8,7 @@ func _ready() -> void:
 	for file in ResourceLoader.list_directory(REACTIONS_DIRECTORY):
 		reactions.append(load(REACTIONS_DIRECTORY + file))
 
-func react(input_substances: Array[Substance], temperature: float) -> Array[Substance]:
+func find_appropriate_reaction(input_substances: Array[Substance], temperature: float) -> Reaction:
 	var filter_func: Callable = func(reaction: Reaction) -> bool:
 		if reaction.reaction_temperature != -1:
 			return (reaction.input_substances == input_substances) and temperature >= reaction.reaction_temperature
@@ -18,6 +18,6 @@ func react(input_substances: Array[Substance], temperature: float) -> Array[Subs
 	var filtered: Array[Reaction] = reactions.filter(filter_func)
 	
 	if len(filtered) > 0:
-		return filtered[0].output_substances.duplicate()
+		return filtered[0]
 	else:
-		return []
+		return null
diff --git a/src/resources/reaction.gd b/src/resources/reaction.gd
index ec6ab32..88d8bf9 100644
--- a/src/resources/reaction.gd
+++ b/src/resources/reaction.gd
@@ -5,3 +5,11 @@ class_name Reaction
 @export var input_substances: Array[ReactionSubstance]
 @export var output_substances: Array[ReactionSubstance]
 @export var reaction_temperature: float = -1
+
+func input_substances_dict() -> Dictionary[StringName, ReactionSubstance]:
+	var result = {}
+	
+	for el in input_substances:
+		result[el.substance.scientific_name] = el
+	
+	return result