Safest way to add a table to a post

Hey. What's the easiest and safest way to add a table to a post? Should I use "obsolete" table cells or is it better to do this on divs? and, what about RWD?

I'm curious how you handle it. Thanks.

<table>
  <tr>
    <th>Company</th>
    <th>Contact</th>
  </tr>
  <tr>
    <td>Alfreds Futterkiste</td>
    <td>Maria Anders</td>
  </tr>
  <tr>
    <td>Centro comercial Moctezuma</td>
    <td>Francisco Chang</td>
  </tr>
</table>

Edited December 20, 20213 yr by SeNioR-