Build your own product: Pick X products and we'll put that in a box.

settings.html

<fieldset>
  <legend>Your pack product</legend>
  <table style="clear:both">
    <tr>
      <td><label for="pack_quantity">How many items in the pack?</label></td>
      <td>
        <select id="pack_quantity" name="pack_quantity">
          <option value="2">2</option>
          <option value="3">3</option>
          <option value="4">4</option>
          <option value="5">5</option>
          <option value="6" selected="selected">6</option>
          <option value="7">7</option>
          <option value="8">8</option>
          <option value="9">9</option>
          <option value="10">10</option>
          <option value="11">11</option>
          <option value="12">12</option>
          <option value="13">13</option>
        </select>
      </td>
    </tr>
    <tr>
      <td><label for="pack_favors">Enter your comma-separated list of favors:</label></td>
      <td><textarea rows="4" cols="50" id="pack_favors" name="pack_favors" /></td>
    </tr>
  </table>
</fieldset>

Hi there, you have a lot of useful stuff - thanks for sharing.
I'm wondering if I can use this gist to create a Home Try-On bundle for my customers, where THEY can choose up to 5 different products and check out at a flat rate ($175). Any insights on that?