Are you taking your garden parasol out today? 
Is it standing unstable in the centre of your table?
Simple re-use an old cooking pan, you can paint it in the same colour of your parasol. Drill a hole in the centre a tiny bit larger than the diameter of your parasol pole, this for drainage as well as to fit the parasol through. Add some plants and you have a beautiful centre piece on your table as well as creative stabilizer for your parasol!