I need to pass product variable defined in hook_theme() and invoked in #theme but not sure how to pass product variables in #theme Please suggest.

    function storeinv_theme() {       return array(         'storeinv_pickup' => array(           'variables' => array('product' => NULL),         ),       );     }      function storeinv_uc_product_description($product)      {       $description = array(         'pickup' => array(           '#product' => array(              '#type' => 'value',              '#value' => $product,            ),            '#theme'  =>'storeinv_pickup',            '#weight' => 1,          ),       );          return $description; }      function theme_storeinv_pickup($product){              $data = $product['#value']->data;              if (isset($data['pickup']['store_id']))             {                     $store_id = $data['pickup']['store_id'];                     $day = $data['pickup']['day'];                     $date = date( 'l m/d/Y g:ia', strtotime( $day ) );                     $result = views_get_view_result('field_altstoreid_value','default');                     foreach($result as $k => $v){                       if ($store_id == $v->field_altstoreid){                             $name = $v->title;                             return "<p>Pickup " .$date."at " . $name." </p>";                       }                     }             }             else {                     return '';             }     }