These balloons are made of aluminium foil, are safe and non-toxic, durable and reusable. The balloons can be filled with air or helium. Please note that balloons do not float when filled with air. Decorate your LOL Birthday Party with our cute LOL theme foil balloons that bring your children great surprises and fun. , , Package includes 5 pc lol surprise theme balloons as 1 Pc Lol Balloon, 2 Pcs round lol character balloons in blue color, 2 Pc pink star foil balloon.