servlet中如何正确有效的删除cookie

Cookie emailCookie = new Cookie(COOKIE_NAME_EMAIL, null);
Cookie pwdCookie = new Cookie(COOKIE_NAME_PWD, null);
for(Cookie c : new Cookie[]{emailCookie, pwdCookie}){
	c.setMaxAge(-1);
	c.setDomain(COOKIE_DOMAIN);
	c.setPath(COOKIE_PATH);
	response.addCookie(c);
}