How to make dichloromethane human-friendly and safe for storage?

I use dichloromethane to polish 3D printed object as postprocessing step.
Most of it is stored in darkened glass on my balcony (now at $\pu{-15^\circ C}$).


What chemical reactions I need to make it human-friendly (non toxic)? Is it ok to use non-darkened polypropylene/polyethylene box to store it? 


What I can do during the summer season? (Dichloromethane is volatile liquid)




According to [A Comprehensive Guide to the Hazardous Properties of Chemical Substances](https://books.google.com/books?id=-CRRJBVv5d0C&pg=PA445&dq=disposal%20methylene%20chloride%20ethanolic%20hydroxide&hl=en&sa=X&ved=0ahUKEwil48WmsrzZAhUmmuAKHYdWDtYQ6AEILDAB#v=onepage&q=disposal%20methylene%20chloride%20ethanolic%20hydroxide&f=false) at pages 445-446:



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> Disposal/Destruction
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> ...
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> Small amounts may be destroyed in the laboratory by hydrolyzing with ethanolic solution of potassium hydroxide
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As in Zhe's comment, you cant make DCM human friendly and you shouldn't be handling it recklessly.


DCM, should be used in a fume hood to avoid breathing the vapors and should be stored in amber winchester bottles in a dark and cold place. It dissolves most polymers, so don't try to store it in a PP or a PE bottle as it will eat through it eventually and also get contaminated.


Lastly, if you want to dispose of it you shouldn't just bin it somewhere. Take it in a lab and they will do it properly. Reading the MSD of DCM would also be a good idea. 


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