Helium ballon life expectancy.?

Anyone know any tricks how to get them to last a little longer than they normally do?

Answers:
keep them in the refrigerator...they will last twice as long

Other answers:
an 11 inch balloon will float at its strongest for 4 hours. unless you can make the air in the room denser, theres not really anything you can do.
an 11 inch balloon will float at its strongest for 4 hours. unless you can make the air in the room denser, theres not really anything you can do.
if you have a hair dryer at least a week, every time the balloon starts to sag just warm it up.
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