diff --git a/eco-api/src/main/java/com/willfp/eco/core/gui/slot/Slot.java b/eco-api/src/main/java/com/willfp/eco/core/gui/slot/Slot.java
index 6fb28ddd..5995e11b 100644
--- a/eco-api/src/main/java/com/willfp/eco/core/gui/slot/Slot.java
+++ b/eco-api/src/main/java/com/willfp/eco/core/gui/slot/Slot.java
@@ -2,10 +2,12 @@ package com.willfp.eco.core.gui.slot;
 
 import com.willfp.eco.core.Eco;
 import com.willfp.eco.core.gui.slot.functional.SlotProvider;
+import com.willfp.eco.core.items.TestableItem;
 import org.bukkit.Material;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.function.Function;
 
@@ -28,6 +30,14 @@ public interface Slot {
      */
     boolean isCaptive();
 
+    /**
+     * Get default captive item.
+     *
+     * @param player The player.
+     * @return The item, or null if no captive default was found.
+     */
+    @Nullable TestableItem getCaptiveDefault(@NotNull Player player);
+
     /**
      * Create a builder for an ItemStack.
      *
diff --git a/eco-api/src/main/java/com/willfp/eco/core/gui/slot/SlotBuilder.java b/eco-api/src/main/java/com/willfp/eco/core/gui/slot/SlotBuilder.java
index caed0b72..af517a45 100644
--- a/eco-api/src/main/java/com/willfp/eco/core/gui/slot/SlotBuilder.java
+++ b/eco-api/src/main/java/com/willfp/eco/core/gui/slot/SlotBuilder.java
@@ -3,10 +3,14 @@ package com.willfp.eco.core.gui.slot;
 import com.willfp.eco.core.gui.slot.functional.SlotHandler;
 import com.willfp.eco.core.gui.slot.functional.SlotModifier;
 import com.willfp.eco.core.gui.slot.functional.SlotUpdater;
+import com.willfp.eco.core.items.TestableItem;
+import org.bukkit.entity.Player;
 import org.bukkit.event.inventory.InventoryClickEvent;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.function.BiConsumer;
+import java.util.function.Function;
 
 /**
  * Builder to create slots.
@@ -130,7 +134,17 @@ public interface SlotBuilder {
      *
      * @return The builder.
      */
-    SlotBuilder setCaptive();
+    default SlotBuilder setCaptive() {
+        return setCaptive(null);
+    }
+
+    /**
+     * Set slot to be a captive default with a default provider.
+     *
+     * @param provider The provider.
+     * @return The builder.
+     */
+    SlotBuilder setCaptive(@Nullable Function<Player, TestableItem> provider);
 
     /**
      * Build the slot.
diff --git a/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/menu/MenuRenderedInventory.kt b/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/menu/MenuRenderedInventory.kt
index 6f6f5dd4..20994f0d 100644
--- a/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/menu/MenuRenderedInventory.kt
+++ b/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/menu/MenuRenderedInventory.kt
@@ -43,7 +43,10 @@ class MenuRenderedInventory(
                 val renderedItem = slot.getItemStack(player)
                 val itemStack = inventory.getItem(i) ?: continue
 
-                if (itemStack == renderedItem || itemStack.type.isAir || itemStack.amount == 0) {
+                val isCaptiveDefault = (slot.getCaptiveDefault(player)?.matches(itemStack))
+                    ?: (renderedItem == itemStack)
+
+                if (isCaptiveDefault || itemStack.type.isAir || itemStack.amount == 0) {
                     continue
                 }
 
diff --git a/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoCaptiveSlot.kt b/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoCaptiveSlot.kt
index cb9ada47..109f9d43 100644
--- a/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoCaptiveSlot.kt
+++ b/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoCaptiveSlot.kt
@@ -2,9 +2,12 @@ package com.willfp.eco.internal.gui.slot
 
 import com.willfp.eco.core.gui.slot.functional.SlotHandler
 import com.willfp.eco.core.gui.slot.functional.SlotProvider
+import com.willfp.eco.core.items.TestableItem
+import org.bukkit.entity.Player
 
 class EcoCaptiveSlot(
-    provider: SlotProvider
+    provider: SlotProvider,
+    private val captiveDefault: ((Player) -> TestableItem?)?
 ) : EcoSlot(
     provider,
     allowMovingItem,
@@ -17,8 +20,12 @@ class EcoCaptiveSlot(
     override fun isCaptive(): Boolean {
         return true
     }
+
+    override fun getCaptiveDefault(player: Player): TestableItem? {
+        return captiveDefault?.invoke(player)
+    }
 }
 
 private val allowMovingItem = SlotHandler { event, _, _ ->
     event.isCancelled = false
-}
\ No newline at end of file
+}
diff --git a/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoSlot.kt b/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoSlot.kt
index 84857be5..66eebbd8 100644
--- a/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoSlot.kt
+++ b/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoSlot.kt
@@ -5,6 +5,7 @@ import com.willfp.eco.core.gui.slot.Slot
 import com.willfp.eco.core.gui.slot.functional.SlotHandler
 import com.willfp.eco.core.gui.slot.functional.SlotProvider
 import com.willfp.eco.core.gui.slot.functional.SlotUpdater
+import com.willfp.eco.core.items.TestableItem
 import com.willfp.eco.internal.gui.menu.getMenu
 import org.bukkit.Material
 import org.bukkit.entity.Player
@@ -55,4 +56,8 @@ open class EcoSlot(
     override fun isCaptive(): Boolean {
         return false
     }
+
+    override fun getCaptiveDefault(player: Player): TestableItem? {
+        return null
+    }
 }
\ No newline at end of file
diff --git a/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoSlotBuilder.kt b/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoSlotBuilder.kt
index d4f7da97..007aa0de 100644
--- a/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoSlotBuilder.kt
+++ b/eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoSlotBuilder.kt
@@ -5,9 +5,13 @@ import com.willfp.eco.core.gui.slot.SlotBuilder
 import com.willfp.eco.core.gui.slot.functional.SlotHandler
 import com.willfp.eco.core.gui.slot.functional.SlotProvider
 import com.willfp.eco.core.gui.slot.functional.SlotUpdater
+import com.willfp.eco.core.items.TestableItem
+import org.bukkit.entity.Player
+import java.util.function.Function
 
 class EcoSlotBuilder(private val provider: SlotProvider) : SlotBuilder {
     private var captive = false
+    private var captiveDefault: ((Player) -> TestableItem?)? = null
     private var updater: SlotUpdater = SlotUpdater { player, menu, _ -> provider.provide(player, menu) }
 
     private var onLeftClick =
@@ -46,8 +50,11 @@ class EcoSlotBuilder(private val provider: SlotProvider) : SlotBuilder {
         return this
     }
 
-    override fun setCaptive(): SlotBuilder {
+    override fun setCaptive(provider: Function<Player, TestableItem>?): SlotBuilder {
         captive = true
+        if (provider != null) {
+            captiveDefault = { provider.apply(it) }
+        }
         return this
     }
 
@@ -58,7 +65,7 @@ class EcoSlotBuilder(private val provider: SlotProvider) : SlotBuilder {
 
     override fun build(): Slot {
         return if (captive) {
-            EcoCaptiveSlot(provider)
+            EcoCaptiveSlot(provider, captiveDefault)
         } else {
             EcoSlot(provider, onLeftClick, onRightClick, onShiftLeftClick, onShiftRightClick, onMiddleClick, updater)
         }