diff --git a/src/main/java/org/spongepowered/api/item/inventory/transaction/InventoryTransactionResult.java b/src/main/java/org/spongepowered/api/item/inventory/transaction/InventoryTransactionResult.java
index d7d636fb4a..a516faaa56 100644
--- a/src/main/java/org/spongepowered/api/item/inventory/transaction/InventoryTransactionResult.java
+++ b/src/main/java/org/spongepowered/api/item/inventory/transaction/InventoryTransactionResult.java
@@ -27,6 +27,7 @@
 import org.spongepowered.api.Sponge;
 import org.spongepowered.api.item.inventory.Inventory;
 import org.spongepowered.api.item.inventory.ItemStack;
+import org.spongepowered.api.item.inventory.ItemStackLike;
 import org.spongepowered.api.item.inventory.ItemStackSnapshot;
 import org.spongepowered.api.util.CopyableBuilder;
 
@@ -179,31 +180,47 @@ interface Builder extends org.spongepowered.api.util.Builder<InventoryTransactio
         Builder type(final Type type);
 
         /**
-         * Adds the provided {@link ItemStack itemstacks} as stacks that have been
+         * @deprecated Use {@link #reject(ItemStackLike...)} instead.
+         */
+        @Deprecated(forRemoval = true)
+        default Builder reject(ItemStack... itemStacks) {
+            return this.reject((ItemStackLike[]) itemStacks);
+        }
+
+        /**
+         * Adds the provided {@link ItemStackLike itemstacks} as stacks that have been
          * "rejected".
          *
          * @param itemStacks The itemstacks being rejected
          * @return This builder, for chaining
          */
-        Builder reject(ItemStack... itemStacks);
+        Builder reject(ItemStackLike... itemStacks);
 
         /**
-         * Adds the provided {@link ItemStack itemstacks} as stacks that have been
+         * Adds the provided {@link ItemStackLike itemstacks} as stacks that have been
          * "rejected".
          *
          * @param itemStacks The itemstacks being rejected
          * @return This builder, for chaining
          */
-        Builder reject(Iterable<ItemStackSnapshot> itemStacks);
+        Builder reject(Iterable<? extends ItemStackLike> itemStacks);
+
+        /**
+         * @deprecated Use {@link #poll(ItemStackLike)} instead.
+         */
+        @Deprecated(forRemoval = true)
+        default Builder.PollBuilder poll(ItemStackSnapshot itemStack) {
+            return this.poll((ItemStackLike) itemStack);
+        }
 
         /**
-         * Sets the provided {@link ItemStackSnapshot} as the stack that has been polled from the inventory.
+         * Sets the provided {@link ItemStackLike} as the stack that has been polled from the inventory.
          *
          * @param itemStack The polled itemstack
          *
          * @return This builder, for chaining
          */
-        Builder.PollBuilder poll(ItemStackSnapshot itemStack);
+        Builder.PollBuilder poll(ItemStackLike itemStack);
 
         /**
          * Adds the provided {@link ItemStack itemstacks} as stacks that are
diff --git a/src/main/java/org/spongepowered/api/item/inventory/transaction/SlotTransaction.java b/src/main/java/org/spongepowered/api/item/inventory/transaction/SlotTransaction.java
index cf25725a58..da31f15953 100644
--- a/src/main/java/org/spongepowered/api/item/inventory/transaction/SlotTransaction.java
+++ b/src/main/java/org/spongepowered/api/item/inventory/transaction/SlotTransaction.java
@@ -26,6 +26,7 @@
 
 import org.spongepowered.api.data.Transaction;
 import org.spongepowered.api.item.inventory.ItemStack;
+import org.spongepowered.api.item.inventory.ItemStackLike;
 import org.spongepowered.api.item.inventory.ItemStackSnapshot;
 import org.spongepowered.api.item.inventory.Slot;
 
@@ -51,12 +52,20 @@ public SlotTransaction(Slot slot, ItemStackSnapshot original, ItemStackSnapshot
     }
 
     /**
-     * Sets the custom {@link ItemStack} output of this
+     * @deprecated Use {@link #setCustom(ItemStackLike)} instead.
+     */
+    @Deprecated(forRemoval = true)
+    public void setCustom(ItemStack stack) {
+        this.setCustom((ItemStackLike) stack);
+    }
+
+    /**
+     * Sets the custom {@link ItemStackLike} output of this
      * {@link SlotTransaction}.
      *
      * @param stack The stack
      */
-    public void setCustom(ItemStack stack) {
+    public void setCustom(ItemStackLike stack) {
         this.setCustom(Objects.requireNonNull(stack, "ItemStack was null").asImmutable());
     }