Super Fun Stylish Foil Balloon Bunches Fully Inflated and Delivered Straight to your Door ! We advise ordering for delivery the working day before you need them. Balloons should float for 3 to 5 days in the right conditions. The foil balloons can inflate and deflate in different temperatures and this is normal. Do not keep in extreme hot or cold areas. Once delivered and accepted we can no longer be responsible for the balloons.