Add liquid void block.

core/src/io/anuke/mindustry/content/Blocks.java

@@ -49,7 +49,7 @@ public class Blocks implements ContentList{
     melter, separator, sporePress, pulverizer, incinerator, coalCentrifuge,
 
     //sandbox
-    powerSource, powerVoid, itemSource, itemVoid, liquidSource, message, illuminator,
+    powerSource, powerVoid, itemSource, itemVoid, liquidSource, liquidVoid, message, illuminator,
 
     //defense
     copperWall, copperWallLarge, titaniumWall, titaniumWallLarge, plastaniumWall, plastaniumWallLarge, thoriumWall, thoriumWallLarge, door, doorLarge,
@@ -1821,6 +1821,11 @@ public class Blocks implements ContentList{
             alwaysUnlocked = true;
         }};
 
+        liquidVoid = new LiquidVoid("liquid-void"){{
+            requirements(Category.liquid, BuildVisibility.sandboxOnly, ItemStack.with());
+            alwaysUnlocked = true;
+        }};
+
         message = new MessageBlock("message"){{
             requirements(Category.effect, ItemStack.with(Items.graphite, 5));
         }};

core/src/io/anuke/mindustry/world/blocks/sandbox/LiquidVoid.java

@@ -0,0 +1,22 @@
+package io.anuke.mindustry.world.blocks.sandbox;
+
+import io.anuke.mindustry.type.Liquid;
+import io.anuke.mindustry.world.Tile;
+import io.anuke.mindustry.world.Block;
+
+public class LiquidVoid extends Block{
+
+    public LiquidVoid(String name){
+        super(name);
+        hasLiquids = true;
+        solid = true;
+        update = true;
+    }
+
+    @Override
+    public boolean acceptLiquid(Tile tile, Tile source, Liquid liquid, float amount){ return true; }
+
+    @Override
+    public void handleLiquid(Tile tile, Tile source, Liquid liquid, float amount){}
+
+}