diff --git a/src/equipment/tool.gd b/src/equipment/tool.gd
index 36b2c80..658a860 100644
--- a/src/equipment/tool.gd
+++ b/src/equipment/tool.gd
@@ -34,6 +34,11 @@ func idle() -> void:
 	_idle()
 
 
+## Is this tool available to the player?
+func unlocked() -> bool:
+	return true
+
+
 func _physics_process(delta: float) -> void:
 	if hud_tool:
 		var weight := 1 - exp(-hud_accel * delta)
diff --git a/src/equipment/toothbrush/toothbrush.gd b/src/equipment/toothbrush/toothbrush.gd
index 70a61e4..4504214 100644
--- a/src/equipment/toothbrush/toothbrush.gd
+++ b/src/equipment/toothbrush/toothbrush.gd
@@ -15,6 +15,10 @@ const BRUSH_SCALE := 0.2
 @onready var resting_position: Marker3D = %RestingPosition
 
 
+func unlocked() -> bool:
+	return Game.manager.toothbrush_unlocked
+
+
 func _fire() -> void:
 	if raycast.is_colliding() and not Game.manager.is_tank_full():
 		brush_animation.play("brush")
diff --git a/src/game/game_manager.gd b/src/game/game_manager.gd
index 98f341e..2feb98e 100644
--- a/src/game/game_manager.gd
+++ b/src/game/game_manager.gd
@@ -23,8 +23,11 @@ signal player_dead
 
 const MAX_ALERT := 6
 
+const BASE_TANK_LIMIT := 96000
+const BIG_TANK_LIMIT := 198000
+
 ## Maximum amount of grunk the player can carry in their tank.
-@export var grunk_tank_limit := 120000
+@export var grunk_tank_limit := BASE_TANK_LIMIT
 
 # TODO figure this out
 @export var grunk_quota := 2000000
@@ -32,10 +35,19 @@ const MAX_ALERT := 6
 ## Grunk collection milestones
 @export var vault_milestones: Dictionary[int, Milestone]
 
+@export_group("Progress")
+@export var mp3_player_unlocked := false
+@export var toothbrush_unlocked := false
+@export var stickers_unlocked := false
+
 var debug_emit_alert_signal: int:
 	set(value):
 		alert_raised.emit(value)
 
+var debug_unlock_milestone: Milestone:
+	set(value):
+		milestone_reached.emit(value)
+
 ## Amount of grunk the player is currently carrying.
 var grunk_tank := 0.0
 
@@ -123,6 +135,18 @@ func next_milestone_amount() -> int:
 	return -1
 
 
+func _on_milestone(milestone: Milestone) -> void:
+	if milestone.mp3_player:
+		mp3_player_unlocked = true
+	elif milestone.toothbrush:
+		toothbrush_unlocked = true
+	elif milestone.stickers:
+		stickers_unlocked = true
+	elif milestone.big_tank:
+		grunk_tank_limit = BIG_TANK_LIMIT
+	# TODO the rest
+
+
 ## Called by Player on death.
 func on_player_death() -> void:
 	player_dead.emit()
diff --git a/src/game/game_manager.tscn b/src/game/game_manager.tscn
index 557ef95..02bc7b7 100644
--- a/src/game/game_manager.tscn
+++ b/src/game/game_manager.tscn
@@ -8,6 +8,15 @@ script = ExtResource("2_b83gw")
 name = "[no reward]"
 message = "Check the MANUAL for SWEET TIPZ
 from the GRUNKIN' MASTERS!"
+bonus_track = false
+mp3_player = false
+toothbrush = false
+seminar = false
+big_tank = false
+stickers = false
+quota = false
+mystery = false
+fiesta = false
 metadata/_custom_type_script = "uid://ufxoxupdvyd5"
 
 [sub_resource type="Resource" id="Resource_b83gw"]
@@ -15,6 +24,15 @@ script = ExtResource("2_b83gw")
 name = "MP3 PLAYER"
 message = "MP3 PLAYER DECRYPTED. Enjoy some
 light music whilst you GRUNK."
+bonus_track = false
+mp3_player = true
+toothbrush = false
+seminar = false
+big_tank = false
+stickers = false
+quota = false
+mystery = false
+fiesta = false
 metadata/_custom_type_script = "uid://ufxoxupdvyd5"
 
 [sub_resource type="Resource" id="Resource_o6um0"]
@@ -22,6 +40,15 @@ script = ExtResource("2_b83gw")
 name = "TOOTHBRUSH"
 message = "TOOTHBRUSH DECRYPTED.
 Enjoy teethbrushing in moderation!"
+bonus_track = false
+mp3_player = false
+toothbrush = true
+seminar = false
+big_tank = false
+stickers = false
+quota = false
+mystery = false
+fiesta = false
 metadata/_custom_type_script = "uid://ufxoxupdvyd5"
 
 [sub_resource type="Resource" id="Resource_vebb4"]
@@ -29,6 +56,15 @@ script = ExtResource("2_b83gw")
 name = "BONUS TRACK"
 message = "BONUS TRACK DELIVERED
 [TODO]"
+bonus_track = true
+mp3_player = false
+toothbrush = false
+seminar = false
+big_tank = false
+stickers = false
+quota = false
+mystery = false
+fiesta = false
 metadata/_custom_type_script = "uid://ufxoxupdvyd5"
 
 [sub_resource type="Resource" id="Resource_aolyc"]
@@ -36,6 +72,15 @@ script = ExtResource("2_b83gw")
 name = "WELLNESS SEMINAR"
 message = "SEMINAR DECRYPTED.
 The FUTURE of WELLNESS is TODAY!"
+bonus_track = false
+mp3_player = false
+toothbrush = false
+seminar = true
+big_tank = false
+stickers = false
+quota = false
+mystery = false
+fiesta = false
 metadata/_custom_type_script = "uid://ufxoxupdvyd5"
 
 [sub_resource type="Resource" id="Resource_36cpv"]
@@ -43,6 +88,15 @@ script = ExtResource("2_b83gw")
 name = "EL TANK GRANDE"
 message = "\"EL TANK GRANDE\" DECRYPTED.
 GRUNK carrying capacity increased."
+bonus_track = false
+mp3_player = false
+toothbrush = false
+seminar = false
+big_tank = true
+stickers = false
+quota = false
+mystery = false
+fiesta = false
 metadata/_custom_type_script = "uid://ufxoxupdvyd5"
 
 [sub_resource type="Resource" id="Resource_pfnwj"]
@@ -50,6 +104,15 @@ script = ExtResource("2_b83gw")
 name = "STICKER PACK"
 message = "NOW PRINTING... You can use
 STICKERS to EXPRESS your \"SELF\""
+bonus_track = false
+mp3_player = false
+toothbrush = false
+seminar = false
+big_tank = false
+stickers = true
+quota = false
+mystery = false
+fiesta = false
 metadata/_custom_type_script = "uid://ufxoxupdvyd5"
 
 [sub_resource type="Resource" id="Resource_p7jc6"]
@@ -57,23 +120,49 @@ script = ExtResource("2_b83gw")
 name = "QUOTA"
 message = "QUOTA    SATISFIED.
 FINE WORK     GRUNKER   !"
+bonus_track = false
+mp3_player = false
+toothbrush = false
+seminar = false
+big_tank = false
+stickers = false
+quota = true
+mystery = false
+fiesta = false
 metadata/_custom_type_script = "uid://ufxoxupdvyd5"
 
 [sub_resource type="Resource" id="Resource_2eyq5"]
 script = ExtResource("2_b83gw")
 name = "???"
 message = "????? ?"
+bonus_track = false
+mp3_player = false
+toothbrush = false
+seminar = false
+big_tank = false
+stickers = false
+quota = false
+mystery = true
+fiesta = false
 metadata/_custom_type_script = "uid://ufxoxupdvyd5"
 
 [sub_resource type="Resource" id="Resource_2qxxw"]
 script = ExtResource("2_b83gw")
-name = "TACO FIESTA"
+name = "taco fiesta"
 message = "ENJOY THE FIESTA        GRUNKER  !"
+bonus_track = false
+mp3_player = false
+toothbrush = false
+seminar = false
+big_tank = false
+stickers = false
+quota = false
+mystery = false
+fiesta = true
 metadata/_custom_type_script = "uid://ufxoxupdvyd5"
 
 [node name="GameManager" type="Node"]
 script = ExtResource("1_08e4a")
-grunk_tank_limit = 96000
 vault_milestones = Dictionary[int, ExtResource("2_b83gw")]({
 0: SubResource("Resource_h4r54"),
 100000: SubResource("Resource_b83gw"),
@@ -91,3 +180,5 @@ vault_milestones = Dictionary[int, ExtResource("2_b83gw")]({
 4200000: SubResource("Resource_vebb4"),
 6400000: SubResource("Resource_2qxxw")
 })
+
+[connection signal="milestone_reached" from="." to="." method="_on_milestone"]
diff --git a/src/game/milestone.gd b/src/game/milestone.gd
index 8d4a391..4031331 100644
--- a/src/game/milestone.gd
+++ b/src/game/milestone.gd
@@ -3,3 +3,14 @@ class_name Milestone extends Resource
 
 @export var name: String
 @export_multiline var message: String
+
+@export_group("Effects")
+@export var bonus_track := false
+@export var mp3_player := false
+@export var toothbrush := false
+@export var seminar := false
+@export var big_tank := false
+@export var stickers := false
+@export var quota := false
+@export var mystery := false
+@export var fiesta := false
diff --git a/src/player/player.gd b/src/player/player.gd
index db7f4cc..f5b4c46 100644
--- a/src/player/player.gd
+++ b/src/player/player.gd
@@ -75,6 +75,7 @@ static var instance: Player
 
 
 func _ready() -> void:
+	Game.manager.milestone_reached.connect(_on_milestone)
 	instance = self
 
 
@@ -157,6 +158,20 @@ func get_grabbed() -> void:
 	camera_pivot.reset_pitch(0.4)
 
 
+#endregion
+
+#region Event Handlers
+
+
+func _on_milestone(milestone: Milestone) -> void:
+	if milestone.mp3_player:
+		pass  # TODO equip mp3 player
+	if milestone.toothbrush:
+		tool_mount.set_active(toothbrush)
+	if milestone.stickers:
+		pass  # TODO equip stickers
+
+
 func _signal_death() -> void:
 	# Called from the death animation
 	Game.manager.on_player_death()
diff --git a/src/player/tool_mount.gd b/src/player/tool_mount.gd
index ffe48c9..9a4ca5a 100644
--- a/src/player/tool_mount.gd
+++ b/src/player/tool_mount.gd
@@ -18,7 +18,11 @@ func get_active() -> Tool:
 ## Sets the given tool as active.
 ##
 ## The tool should be a child of this mount.
-func set_active(tool: Tool) -> void:
+## If the tool is not unlocked and `force` is false, this will have no effect.
+func set_active(tool: Tool, force: bool = false) -> void:
+	if not force and not tool.unlocked():
+		return
+
 	for c: Node3D in get_children():
 		c.visible = false
 		# TODO unequip animation?
@@ -32,5 +36,12 @@ func set_active(tool: Tool) -> void:
 ## Use this for "select next/prev tool" functions.
 func set_active_relative(delta: int) -> void:
 	var active_idx := _active.get_index()
-	var new_idx := wrapi(active_idx + delta, 0, get_child_count())
-	set_active(get_child(new_idx) as Tool)
+	while true:
+		var new_idx := wrapi(active_idx + delta, 0, get_child_count())
+		var tool := get_child(new_idx) as Tool
+		if tool.unlocked():
+			set_active(tool)
+			return
+		# If the next tool is not unlocked, try the one after
+		# NOTE: this will loop forever if the player has no tools unlocked!
+		active_idx = new_idx