diff --git a/src/pocketmine/tile/Chest.php b/src/pocketmine/tile/Chest.php
index 7bee9843b..1b723dad0 100644
--- a/src/pocketmine/tile/Chest.php
+++ b/src/pocketmine/tile/Chest.php
@@ -36,7 +36,7 @@ use pocketmine\nbt\tag\ListTag;
 use pocketmine\Player;
 
 class Chest extends Spawnable implements InventoryHolder, Container, Nameable{
-	use NameableTrait;
+	use NameableTrait, ContainerTrait;
 
 	const TAG_PAIRX = "pairx";
 	const TAG_PAIRZ = "pairz";
@@ -50,14 +50,7 @@ class Chest extends Spawnable implements InventoryHolder, Container, Nameable{
 	public function __construct(Level $level, CompoundTag $nbt){
 		parent::__construct($level, $nbt);
 		$this->inventory = new ChestInventory($this);
-
-		if(!$this->namedtag->hasTag("Items", ListTag::class)){
-			$this->namedtag->setTag(new ListTag("Items", [], NBT::TAG_Compound));
-		}
-
-		for($i = 0; $i < $this->getSize(); ++$i){
-			$this->inventory->setItem($i, $this->getItem($i), false);
-		}
+		$this->loadItems();
 	}
 
 	public function close() : void{
@@ -78,10 +71,7 @@ class Chest extends Spawnable implements InventoryHolder, Container, Nameable{
 
 	public function saveNBT() : void{
 		parent::saveNBT();
-		$this->namedtag->setTag(new ListTag("Items", [], NBT::TAG_Compound));
-		for($index = 0; $index < $this->getSize(); ++$index){
-			$this->setItem($index, $this->inventory->getItem($index));
-		}
+		$this->saveItems();
 	}
 
 	/**
@@ -91,72 +81,6 @@ class Chest extends Spawnable implements InventoryHolder, Container, Nameable{
 		return 27;
 	}
 
-	/**
-	 * @param $index
-	 *
-	 * @return int
-	 */
-	protected function getSlotIndex(int $index) : int{
-		$items = $this->namedtag->getListTag("Items");
-		assert($items instanceof ListTag);
-		foreach($items as $i => $slot){
-			/** @var CompoundTag $slot */
-			if($slot->getByte("Slot") === $index){
-				return (int) $i;
-			}
-		}
-
-		return -1;
-	}
-
-	/**
-	 * This method should not be used by plugins, use the Inventory
-	 *
-	 * @param int $index
-	 *
-	 * @return Item
-	 */
-	public function getItem(int $index) : Item{
-		$i = $this->getSlotIndex($index);
-		if($i < 0){
-			return ItemFactory::get(Item::AIR, 0, 0);
-		}else{
-			return Item::nbtDeserialize($this->namedtag->getListTag("Items")[$i]);
-		}
-	}
-
-	/**
-	 * This method should not be used by plugins, use the Inventory
-	 *
-	 * @param int  $index
-	 * @param Item $item
-	 */
-	public function setItem(int $index, Item $item){
-		$i = $this->getSlotIndex($index);
-
-		$d = $item->nbtSerialize($index);
-
-		$items = $this->namedtag->getListTag("Items");
-		assert($items instanceof ListTag);
-
-		if($item->isNull()){
-			if($i >= 0){
-				unset($items[$i]);
-			}
-		}elseif($i < 0){
-			for($i = 0; $i <= $this->getSize(); ++$i){
-				if(!isset($items[$i])){
-					break;
-				}
-			}
-			$items[$i] = $d;
-		}else{
-			$items[$i] = $d;
-		}
-
-		$this->namedtag->setTag($items);
-	}
-
 	/**
 	 * @return ChestInventory|DoubleChestInventory
 	 */
diff --git a/src/pocketmine/tile/Container.php b/src/pocketmine/tile/Container.php
index 261e057b9..34e358237 100644
--- a/src/pocketmine/tile/Container.php
+++ b/src/pocketmine/tile/Container.php
@@ -27,6 +27,7 @@ use pocketmine\inventory\Inventory;
 use pocketmine\item\Item;
 
 interface Container{
+	const TAG_ITEMS = "Items";
 
 	/**
 	 * @param int $index
diff --git a/src/pocketmine/tile/ContainerTrait.php b/src/pocketmine/tile/ContainerTrait.php
new file mode 100644
index 000000000..1b472c864
--- /dev/null
+++ b/src/pocketmine/tile/ContainerTrait.php
@@ -0,0 +1,135 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\tile;
+
+use pocketmine\inventory\Inventory;
+use pocketmine\item\Item;
+use pocketmine\item\ItemFactory;
+use pocketmine\nbt\NBT;
+use pocketmine\nbt\tag\CompoundTag;
+use pocketmine\nbt\tag\ListTag;
+
+/**
+ * This trait implements most methods in the {@link Container} interface. It should only be used by Tiles.
+ */
+trait ContainerTrait{
+
+	/**
+	 * @return int
+	 */
+	abstract public function getSize() : int;
+
+	abstract public function getNBT() : CompoundTag;
+
+	/**
+	 * @return Inventory
+	 */
+	abstract public function getInventory();
+
+	/**
+	 * @param $index
+	 *
+	 * @return int
+	 */
+	protected function getSlotIndex(int $index) : int{
+		foreach($this->getNBT()->getListTag(Container::TAG_ITEMS) as $i => $slot){
+			/** @var CompoundTag $slot */
+			if($slot->getByte("Slot") === $index){
+				return (int) $i;
+			}
+		}
+
+		return -1;
+	}
+
+	/**
+	 * This method should not be used by plugins, use the Inventory
+	 *
+	 * @param int $index
+	 *
+	 * @return Item
+	 */
+	public function getItem(int $index) : Item{
+		$i = $this->getSlotIndex($index);
+		/** @var CompoundTag|null $itemTag */
+		$itemTag = $this->getNBT()->getListTag(Container::TAG_ITEMS)[$i] ?? null;
+		if($itemTag !== null){
+			return Item::nbtDeserialize($itemTag);
+		}
+
+		return ItemFactory::get(Item::AIR, 0, 0);
+	}
+
+	/**
+	 * This method should not be used by plugins, use the Inventory
+	 *
+	 * @param int  $index
+	 * @param Item $item
+	 */
+	public function setItem(int $index, Item $item) : void{
+		$i = $this->getSlotIndex($index);
+
+		$d = $item->nbtSerialize($index);
+
+		$items = $this->getNBT()->getListTag(Container::TAG_ITEMS);
+		assert($items instanceof ListTag);
+
+		if($item->isNull()){
+			if($i >= 0){
+				unset($items[$i]);
+			}
+		}elseif($i < 0){
+			for($i = 0; $i <= $this->getSize(); ++$i){
+				if(!isset($items[$i])){
+					break;
+				}
+			}
+			$items[$i] = $d;
+		}else{
+			$items[$i] = $d;
+		}
+
+		$this->getNBT()->setTag($items);
+	}
+
+	protected function loadItems() : void{
+		if(!$this->getNBT()->hasTag(Container::TAG_ITEMS, ListTag::class)){
+			$this->getNBT()->setTag(new ListTag(Container::TAG_ITEMS, [], NBT::TAG_Compound));
+		}
+
+		$inventory = $this->getInventory();
+		for($i = 0, $size = $this->getSize(); $i < $size; ++$i){
+			$inventory->setItem($i, $this->getItem($i));
+		}
+	}
+
+	protected function saveItems() : void{
+		$this->getNBT()->setTag(new ListTag(Container::TAG_ITEMS, [], NBT::TAG_Compound));
+
+		$inventory = $this->getInventory();
+		for($i = 0, $size = $this->getSize(); $i < $size; ++$i){
+			$this->setItem($i, $inventory->getItem($i));
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/pocketmine/tile/Furnace.php b/src/pocketmine/tile/Furnace.php
index d17518e75..9b91a93a0 100644
--- a/src/pocketmine/tile/Furnace.php
+++ b/src/pocketmine/tile/Furnace.php
@@ -42,7 +42,7 @@ use pocketmine\network\mcpe\protocol\ContainerSetDataPacket;
 use pocketmine\Player;
 
 class Furnace extends Spawnable implements InventoryHolder, Container, Nameable{
-	use NameableTrait;
+	use NameableTrait, ContainerTrait;
 
 	const TAG_BURN_TIME = "BurnTime";
 	const TAG_COOK_TIME = "CookTime";
@@ -76,14 +76,7 @@ class Furnace extends Spawnable implements InventoryHolder, Container, Nameable{
 
 		parent::__construct($level, $nbt);
 		$this->inventory = new FurnaceInventory($this);
-
-		if(!($this->namedtag->getTag("Items") instanceof ListTag)){
-			$this->namedtag->setTag(new ListTag("Items", [], NBT::TAG_Compound));
-		}
-
-		for($i = 0; $i < $this->getSize(); ++$i){
-			$this->inventory->setItem($i, $this->getItem($i), false);
-		}
+		$this->loadItems();
 
 		if($this->namedtag->getShort(self::TAG_BURN_TIME) > 0){
 			$this->scheduleUpdate();
@@ -108,10 +101,7 @@ class Furnace extends Spawnable implements InventoryHolder, Container, Nameable{
 
 	public function saveNBT() : void{
 		parent::saveNBT();
-		$this->namedtag->setTag(new ListTag("Items", [], NBT::TAG_Compound));
-		for($index = 0; $index < $this->getSize(); ++$index){
-			$this->setItem($index, $this->inventory->getItem($index));
-		}
+		$this->saveItems();
 	}
 
 	/**
@@ -121,70 +111,6 @@ class Furnace extends Spawnable implements InventoryHolder, Container, Nameable{
 		return 3;
 	}
 
-	/**
-	 * @param $index
-	 *
-	 * @return int
-	 */
-	protected function getSlotIndex(int $index) : int{
-		foreach($this->namedtag->getListTag("Items") as $i => $slot){
-			/** @var CompoundTag $slot */
-			if($slot->getByte("Slot") === $index){
-				return (int) $i;
-			}
-		}
-
-		return -1;
-	}
-
-	/**
-	 * This method should not be used by plugins, use the Inventory
-	 *
-	 * @param int $index
-	 *
-	 * @return Item
-	 */
-	public function getItem(int $index) : Item{
-		$i = $this->getSlotIndex($index);
-		if($i < 0){
-			return ItemFactory::get(Item::AIR, 0, 0);
-		}else{
-			return Item::nbtDeserialize($this->namedtag->getListTag("Items")[$i]);
-		}
-	}
-
-	/**
-	 * This method should not be used by plugins, use the Inventory
-	 *
-	 * @param int  $index
-	 * @param Item $item
-	 */
-	public function setItem(int $index, Item $item){
-		$i = $this->getSlotIndex($index);
-
-		$d = $item->nbtSerialize($index);
-
-		$items = $this->namedtag->getListTag("Items");
-		assert($items instanceof ListTag);
-
-		if($item->isNull()){
-			if($i >= 0){
-				unset($items[$i]);
-			}
-		}elseif($i < 0){
-			for($i = 0; $i <= $this->getSize(); ++$i){
-				if(!isset($items[$i])){
-					break;
-				}
-			}
-			$items[$i] = $d;
-		}else{
-			$items[$i] = $d;
-		}
-
-		$this->namedtag->setTag($items);
-	}
-
 	/**
 	 * @return FurnaceInventory
 	 */