Using Radio buttons while making a TAB (Module EE)

function publish_tabs($channel_id, $entry_id = '')
 {

  $settings = array();
  
  $existing_files = array('0','1');
  
  
  $settings[] = array(
    'field_id'    => 'message_preview',
    'field_label'   =>  ee()->lang->line('tab_title'),
    'field_required'   => 'n',
    'field_list_items'  => $existing_files,
    'field_data'   => '0',
    'field_instructions'  => ee()->lang->line('tab_instructions'),
    'field_pre_populate' => 'n',
    'field_text_direction' => 'ltr',
    'field_type'    => 'radio',
    'module_name'    => 'Message Test'    
  );
  
   

  return $settings;
  
 }

<input type="radio" name="radio" value="0"> Water

<input type="radio" name="radio" value="1"> Juice