{% comment %}
  See https://docs.shopify.com/themes/customization/products/how-to-add-a-pick-an-option-to-drop-downs
{% endcomment %}


<script>

  $(document).ready(function() {
  if( typeof(productOptions ) != "undefined" ){
    for(i=0;i<productOptions.length;i++) {
      $('.single-option-selector:eq('+ i +')')
      .filter(function() {
        return $(this).find('option').length > 1
      })
      .prepend('<option value="">Pick a ' + productOptions[i][i] + '</option>')
      .val('')
      .trigger('change');
    }
  }
});
</script>