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I used the instructables Designer vases from used coffee cups 
https://www.instructables.com/id/Designer-vases-from-used-coffee-cups/

And filled the coffee cups with concrete. 

Removed the foam and combine different forms . 

On top i choose a open coffee cup form. To maken it a vase. 

M





Good stuff - some pretty crazy shapes here! Good to see the polystyrene stands up well as a concrete form. I wonder if you pushed a cylinder down into the concrete before it set if you could make a proper concrete vase?
Good work! Mister M.;)

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