I'm building a paint store where customers can select a RAL color and choose quantity in liters. The price is calculated based on the color recipe. Currently when a product is added, the price and product description are showed correctly. However when I try to pick up another color, it does not add the product in the cart. Here is the best custom code I could make so far: add_filter('woocommerce_add_cart_item' , 'set_woo_prices'); add_filter('woocommerce_get_cart_item_from_session', 'set_session_prices', 10 , 3); function set_woo_prices($woo_data) { if (empty($_POST['kforwselectcolorprice'])) { return $woo_data; } $woo_data['my_prod_name'] = $_POST['kforwselectcolorname']; foreach ($_POST['kforwoo_variation_quantity'] as $prodVarName => $prodVarQty) { if (empty($prodVarQty)) { continue; } $woo_data['my_prod_name'] .= sprintf("<br/> %s x %d", $prodVarName, $prodVarQty); } $woo_data['my_price'] = $_POST['kforwselectcolorprice']; $woo_data['data']->set_price($_POST['kforwselectcolorprice']); $woo_data['data']->set_name($woo_data['my_prod_name']); return $woo_data; } function set_session_prices($woo_data, $values, $key) { if (empty($woo_data['my_price']) || empty($woo_data['my_prod_name'])) { return $woo_data; } $woo_data['data']->set_price($woo_data['my_price']); $woo_data['data']->set_name($woo_data['my_prod_name']); return $woo_data; } Update: Only the first time a product is added the hook woocommerce_add_cart_item is called. On any consecutive calls, the hook is not executed... Update2: I'm using the plugin Custom Paint Variation for WooCommerce