No, helium does not expire. You must close the valve tightly or helium will leak over time. Are Balloon Time tanks recyclable? Yes, Balloon Time tanks are fully recyclable.

How long do helium tanks last?

Latex Balloons: Tank will fill approximately (30) - 9 inch latex balloons or (16)- 11 inch latex balloons. The float time for each latex balloon is approximately 5-7 hours.

What do you do with old helium tanks?

Take the tank to a steel recycling center or place with curbside recycling pickup. However, please note that recycling programs for this product may not exist in your area.