title: Where to put constants in Rails
body: <p>I have a few constants which are arrays that I don't want to create databse records for but I don't know where to store the constants without getting errors.</p>
  
  <p>For example</p>
  
  <pre><code>CONTAINER_SIZES = [["20 foot"],["40 foot"]]
  </code></pre>
  
  <p>Where can I store this so all models and controller have access to this?</p>