including multiple copies of the same model in the file.world??

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Hello,

Is there a way to include multiple copies of the same model with different position in the world file?

For example: I have the coke_can model, that I want to include multiple copies of it in my world file as following:

  <include>
      <uri>model://coke_can</uri>
      <pose>-0.0 -2 0 0 0 0</pose>
   </include>

    <include>
        <uri>model://coke_can</uri>
        <pose>-0.0 -5 1 0 0 0</pose>
    </include>

but when I do this , the first model overrides the second one. In other words , only the first model shows up in the world file.

Any ideas or suggestions to solve this are very much appreciated!

Thanks in advance.