For parasols you use in the middle of tables, look to this Outsunny outdoor umbrella stand base to hold it in place. The tough plastic shell makes it suitable for outdoor use, with a concrete filling so it stands the parasol sterady in place. Features a tightening knob - once the umbrella is in place, all you have to do is tightening for full security. - OUTSUNNY 11kg Concrete Square Garden Parasol Base Holder for Table Umbrella in Black