![A balloon filled with helium or hydrogen gas keeps on going vertically upward into the sky indefinitely. A balloon filled with helium or hydrogen gas keeps on going vertically upward into the sky indefinitely.](https://search-static.byjusweb.com/question-images/byjus/_52d4604d2f3e13fd08ff695b3f44b149bba8547720160627-28069-hldej0.png)
A balloon filled with helium or hydrogen gas keeps on going vertically upward into the sky indefinitely.
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Amazon.com: Party Factory Helium Tank for up to 30 Balloons incl. Latex Balloons, Helium Cylinder 7 cu. ft. Gas with filling quantity for Balloons, Ideal for Birthday Party, Wedding : Toys & Games
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