diff --git a/eco-api/src/main/java/com/willfp/eco/core/gui/slot/CustomSlot.java b/eco-api/src/main/java/com/willfp/eco/core/gui/slot/CustomSlot.java
index 00a1d6bf..1cb53038 100644
--- a/eco-api/src/main/java/com/willfp/eco/core/gui/slot/CustomSlot.java
+++ b/eco-api/src/main/java/com/willfp/eco/core/gui/slot/CustomSlot.java
@@ -51,14 +51,14 @@ public abstract class CustomSlot implements Slot {
     }
 
     @Override
-    public final boolean canCaptivateItem(@NotNull final Player player,
+    public final boolean isAllowedCaptive(@NotNull final Player player,
                                           @NotNull final Menu menu,
                                           @Nullable final ItemStack itemStack) {
         if (delegate == null) {
             throw new IllegalStateException("Custom Slot was not initialized!");
         }
 
-        return delegate.canCaptivateItem(player, menu, itemStack);
+        return delegate.isAllowedCaptive(player, menu, itemStack);
     }
 
     @Override
diff --git a/eco-api/src/main/java/com/willfp/eco/core/gui/slot/ReactiveSlot.java b/eco-api/src/main/java/com/willfp/eco/core/gui/slot/ReactiveSlot.java
index f4321817..fa86a857 100644
--- a/eco-api/src/main/java/com/willfp/eco/core/gui/slot/ReactiveSlot.java
+++ b/eco-api/src/main/java/com/willfp/eco/core/gui/slot/ReactiveSlot.java
@@ -41,10 +41,10 @@ public abstract class ReactiveSlot implements Slot {
     }
 
     @Override
-    public final boolean canCaptivateItem(@NotNull final Player player,
-                                    @NotNull final Menu menu,
-                                    @Nullable final ItemStack itemStack) {
-        return getSlot(player, menu).canCaptivateItem(player, menu, itemStack);
+    public final boolean isAllowedCaptive(@NotNull final Player player,
+                                          @NotNull final Menu menu,
+                                          @Nullable final ItemStack itemStack) {
+        return getSlot(player, menu).isAllowedCaptive(player, menu, itemStack);
     }
 
     @Override
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 a9b2f4ba..34f25678 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
@@ -47,14 +47,14 @@ public interface Slot extends GUIComponent {
     }
 
     /**
-     * If the slot is captive for a given item (can this item be placed in it).
+     * If the slot allows a certain item to be placed in it.
      *
      * @param player    The player.
      * @param menu      The menu.
      * @param itemStack The item; use null if the item is unknown.
      * @return If captive.
      */
-    default boolean canCaptivateItem(@NotNull final Player player,
+    default boolean isAllowedCaptive(@NotNull final Player player,
                                      @NotNull final Menu menu,
                                      @Nullable final ItemStack itemStack) {
         return true;
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 1e86e7a2..fef7cc10 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
@@ -1,6 +1,6 @@
 package com.willfp.eco.core.gui.slot;
 
-import com.willfp.eco.core.gui.slot.functional.CaptiveCondition;
+import com.willfp.eco.core.gui.slot.functional.CaptiveFilter;
 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;
@@ -149,10 +149,10 @@ public interface SlotBuilder {
     /**
      * Set a whitelist for allowed captive items.
      *
-     * @param condition The condition. Returns true when the slot should be captive.
+     * @param filter The filter.
      * @return The builder.
      */
-    default SlotBuilder setCaptiveCondition(@NotNull final CaptiveCondition condition) {
+    default SlotBuilder setCaptiveFilter(@NotNull final CaptiveFilter filter) {
         return this;
     }
 
diff --git a/eco-api/src/main/java/com/willfp/eco/core/gui/slot/functional/CaptiveCondition.java b/eco-api/src/main/java/com/willfp/eco/core/gui/slot/functional/CaptiveFilter.java
similarity index 72%
rename from eco-api/src/main/java/com/willfp/eco/core/gui/slot/functional/CaptiveCondition.java
rename to eco-api/src/main/java/com/willfp/eco/core/gui/slot/functional/CaptiveFilter.java
index df4f4761..24a6cd1c 100644
--- a/eco-api/src/main/java/com/willfp/eco/core/gui/slot/functional/CaptiveCondition.java
+++ b/eco-api/src/main/java/com/willfp/eco/core/gui/slot/functional/CaptiveFilter.java
@@ -7,19 +7,19 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 /**
- * Interface to test if a captive slot is captive given a player, menu, and item.
+ * Interface to test if a captive slot is allowed to contain an item given a player and a menu.
  */
 @FunctionalInterface
-public interface CaptiveCondition {
+public interface CaptiveFilter {
     /**
-     * Get if the slot is captive.
+     * Get if allowed.
      *
      * @param player    The player.
      * @param menu      The menu.
      * @param itemStack The item.
      * @return If captive.
      */
-    boolean isCaptive(@NotNull Player player,
+    boolean isAllowed(@NotNull Player player,
                       @NotNull Menu menu,
                       @Nullable ItemStack itemStack);
 }
diff --git a/eco-api/src/main/kotlin/com/willfp/eco/core/gui/GUIHelpers.kt b/eco-api/src/main/kotlin/com/willfp/eco/core/gui/GUIHelpers.kt
index a90f352e..1d3acf6c 100644
--- a/eco-api/src/main/kotlin/com/willfp/eco/core/gui/GUIHelpers.kt
+++ b/eco-api/src/main/kotlin/com/willfp/eco/core/gui/GUIHelpers.kt
@@ -74,9 +74,9 @@ fun SlotBuilder.onClick(clickType: ClickType, action: (Player, InventoryClickEve
 fun SlotBuilder.notCaptiveFor(test: (Player) -> Boolean): SlotBuilder =
     this.notCaptiveFor { test(it) }
 
-/** @see SlotBuilder.setCaptiveCondition */
-fun SlotBuilder.setCaptiveCondition(test: (Player, Menu, ItemStack?) -> Boolean): SlotBuilder =
-    this.setCaptiveCondition { a, b, c -> test(a, b, c) }
+/** @see SlotBuilder.setCaptiveFilter */
+fun SlotBuilder.setCaptiveFilter(test: (Player, Menu, ItemStack?) -> Boolean): SlotBuilder =
+    this.setCaptiveFilter { a, b, c -> test(a, b, c) }
 
 /**
  * @see SlotBuilder.setModifier
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 c2f83eff..d25b4ce3 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
@@ -1,7 +1,7 @@
 package com.willfp.eco.internal.gui.slot
 
 import com.willfp.eco.core.gui.menu.Menu
-import com.willfp.eco.core.gui.slot.functional.CaptiveCondition
+import com.willfp.eco.core.gui.slot.functional.CaptiveFilter
 import com.willfp.eco.core.gui.slot.functional.SlotHandler
 import com.willfp.eco.core.gui.slot.functional.SlotProvider
 import com.willfp.eco.util.toSingletonList
@@ -13,11 +13,11 @@ class EcoCaptiveSlot(
     provider: SlotProvider,
     private val captiveFromEmpty: Boolean,
     private val notCaptiveFor: (Player) -> Boolean,
-    private val condition: CaptiveCondition
+    private val filter: CaptiveFilter
 ) : EcoSlot(
     provider,
     ClickType.values().associateWith {
-        captiveWithTest(notCaptiveFor, condition).toSingletonList()
+        captiveWithTest(notCaptiveFor, filter).toSingletonList()
     },
     { _, _, prev -> prev }
 ) {
@@ -25,8 +25,8 @@ class EcoCaptiveSlot(
         return !notCaptiveFor(player)
     }
 
-    override fun canCaptivateItem(player: Player, menu: Menu, itemStack: ItemStack?): Boolean {
-        return condition.isCaptive(player, menu, itemStack)
+    override fun isAllowedCaptive(player: Player, menu: Menu, itemStack: ItemStack?): Boolean {
+        return filter.isAllowed(player, menu, itemStack)
     }
 
     override fun isCaptiveFromEmpty(): Boolean {
@@ -36,12 +36,12 @@ class EcoCaptiveSlot(
 
 private fun captiveWithTest(
     playerTest: (Player) -> Boolean,
-    condition: CaptiveCondition
+    filter: CaptiveFilter
 ): SlotHandler = SlotHandler { event, _, menu ->
     val player = event.whoClicked as Player
 
     val allowedForPlayer = !playerTest(player)
-    val allowedForCondition = condition.isCaptive(player, menu, event.currentItem)
+    val allowedForCondition = filter.isAllowed(player, menu, event.currentItem)
 
     event.isCancelled = !(allowedForCondition && allowedForPlayer)
 }
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 7703147a..c8668296 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
@@ -2,7 +2,7 @@ package com.willfp.eco.internal.gui.slot
 
 import com.willfp.eco.core.gui.slot.Slot
 import com.willfp.eco.core.gui.slot.SlotBuilder
-import com.willfp.eco.core.gui.slot.functional.CaptiveCondition
+import com.willfp.eco.core.gui.slot.functional.CaptiveFilter
 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
@@ -17,7 +17,8 @@ class EcoSlotBuilder(private val provider: SlotProvider) : SlotBuilder {
 
     private val handlers = mutableMapOf<ClickType, MutableList<SlotHandler>>()
 
-    private var captiveCondition = CaptiveCondition { _, _, _ -> true }
+    private var captiveFilter =
+        CaptiveFilter { _, _, _ -> true }
     private var notCaptiveFor: (Player) -> Boolean = { _ -> false}
 
     override fun onClick(type: ClickType, action: SlotHandler): SlotBuilder {
@@ -30,8 +31,8 @@ class EcoSlotBuilder(private val provider: SlotProvider) : SlotBuilder {
         return this
     }
 
-    override fun setCaptiveCondition(condition: CaptiveCondition): SlotBuilder {
-        captiveCondition = condition
+    override fun setCaptiveFilter(filter: CaptiveFilter): SlotBuilder {
+        captiveFilter = filter
         return this
     }
 
@@ -52,7 +53,7 @@ class EcoSlotBuilder(private val provider: SlotProvider) : SlotBuilder {
                 provider,
                 captiveFromEmpty,
                 notCaptiveFor,
-                captiveCondition
+                captiveFilter
             )
         } else {
             EcoSlot(
diff --git a/eco-core/core-plugin/src/main/kotlin/com/willfp/eco/internal/spigot/gui/GUIListener.kt b/eco-core/core-plugin/src/main/kotlin/com/willfp/eco/internal/spigot/gui/GUIListener.kt
index 62b23f29..93a0122d 100644
--- a/eco-core/core-plugin/src/main/kotlin/com/willfp/eco/internal/spigot/gui/GUIListener.kt
+++ b/eco-core/core-plugin/src/main/kotlin/com/willfp/eco/internal/spigot/gui/GUIListener.kt
@@ -95,7 +95,7 @@ class GUIListener(private val plugin: EcoPlugin) : Listener {
 
         val slot = menu.getSlot(row, column, player)
 
-        if (!slot.isCaptive(player, menu) && slot.canCaptivateItem(player, menu, event.currentItem)) {
+        if (!slot.isCaptive(player, menu) && slot.isAllowedCaptive(player, menu, event.currentItem)) {
             event.isCancelled = true
         }
     }
diff --git a/gradle.properties b/gradle.properties
index f9733eeb..fa723f55 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,3 +1,3 @@
-version = 6.46.1
+version = 6.47.0
 plugin-name = eco
 kotlin.code.style = official
\ No newline at end of file