public function check_cart_coupons() {
		foreach ( $this->get_applied_coupons() as $code ) {
			$coupon = new WC_Coupon( $code );

			if ( ! $coupon->is_valid() ) {
				$coupon->add_coupon_message( WC_Coupon::E_WC_COUPON_INVALID_REMOVED );
				$this->remove_coupon( $code );
			}
		}
	}