For holding your half parasol, look to this Outsunny fillable umbrella base. Fill it with 18kg of water or 21kg of sand to keep it weighed down.
It is engraved with a top pattern for a decorative touch to your outdoors. The metal pole with tightening screws holds your umbrella securely and evenly in place, so the umbrella can provide much-needed shade. Made from tough plastic it's suitable for outdoor use, in plenty of different weather.