You can also get a Zerowater pitcher. It will give you .000TDS. I have been using this for 2+ years. Never used an RO or RO/DI. There is a 6, 10, or 22 cup container you can pick up at Bed Bath and Beyond, Walmart, or Homedepot. The 22 cup comes with a TDS meter. All three types come with a filter. So this will also get you what you need. Just make sure you use Prime to take out any treatment of the water and you are good to go after the water has filter down to .000TDS.
Also it is literally the best tasting water you can drink when you are done with what you need it for.