diff --git a/src/net/bdew/lib/Misc.scala b/src/net/bdew/lib/Misc.scala
index a1d9a51..06b56a4 100644
--- a/src/net/bdew/lib/Misc.scala
+++ b/src/net/bdew/lib/Misc.scala
@@ -108,11 +108,19 @@ object Misc {
   def nextInSeq[T](seq: Seq[T], elem: T) = {
     val pos = seq.indexOf(elem)
     if (pos < 0 || pos == seq.size - 1)
-      seq(0)
+      seq.head
     else
       seq(pos + 1)
   }
 
+  def prevInSeq[T](seq: Seq[T], elem: T) = {
+    val pos = seq.indexOf(elem)
+    if (pos <= 0)
+      seq.last
+    else
+      seq(pos - 1)
+  }
+
   def getFluidIcon(fs: FluidStack): IIcon =
     if (fs != null && fs.getFluid != null && fs.getFluid.getIcon != null)
       fs.getFluid.getIcon(fs)
diff --git a/src/net/bdew/lib/tile/inventory/SimpleInventory.scala b/src/net/bdew/lib/tile/inventory/SimpleInventory.scala
new file mode 100644
index 0000000..64594c2
--- /dev/null
+++ b/src/net/bdew/lib/tile/inventory/SimpleInventory.scala
@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) bdew, 2013 - 2015
+ * https://github.com/bdew/bdlib
+ *
+ * This mod is distributed under the terms of the Minecraft Mod Public
+ * License 1.0, or MMPL. Please check the contents of the license located in
+ * http://bdew.net/minecraft-mod-public-license/
+ */
+
+package net.bdew.lib.tile.inventory
+
+class SimpleInventory(size: Int) extends BaseInventory {
+  override def getSizeInventory = size
+  override def markDirty() = {}
+}