Foil balloons can be air or helium filled. If you want to air fill them you will need a balloon pump which you will find in accessories. They self seal and then you can place them on the Bride's bed or stick on the wall. They will generally last for 1 week air filled.
If you want to helium fill them, we can do that here in henworld for €2.50 per 18" foil balloon and this includes ribbon and a weight. Helium filled foils last from 2 to 4 weeks. For further information please use the messaging service on the website.