Using these balloons is easy. For helium filling, use a helium tank to inflate the balloons. They'll float and add a great touch to your party. Remember to inflate them close to the event start so they float for about 10 hours. If you want to use air, just blow into the balloons or use an air pump. Balloons filled with air won't float but will last 5 - 7 days. Keep them away from sharp objects to avoid popping. Store them in a cool, dry place when not in use. And keep in mind, these balloons are non-returnable and non-refundable.