+-------+     +----------+         +-----------+    +-------------+
| %hash | +-->| Anon Ref |  +----->| Anon hash | +->| Anon scalar |
+-------+ |   +----------+  |      +-----------+ |  +-------------+
| a   ----+   | addr   -----+      | drinks  ----+  | 1           |
| b   -----+  +----------+  |      +-----------+    +-------------+
+-------+  |                |
           |  +----------+  |      +-----------+    +-------------+
           +->| Anon Ref |  |  +-->| Anon hash | +->| Anon scalar |
              +----------+  |  |   +-----------+ |  +-------------+
              | addr   --------+   | drinks  ----+  | 2           |
              +----------+  |  |   +-----------+    +-------------+
                            |  |
+-------+     +NEW-------+  |  |
| %copy | +-->| Anon Ref |  |  |
+-------+ |   +----------+  |  |
| a   ----+   | addr   -----+  |
| b   -----+  +----------+     |
+-------+  |                   |
           |  +NEW-------+     |
           +->| Anon Ref |     |
              +----------+     |
              | addr   --------+
              +----------+