One thing to keep in mind is that the helium used for balloons is a fairly small amount of helium compared to say, an MRI machine, in the same way a dripping fa

One thing to keep in mind is that the helium used for balloons is a fairly small amount of helium compared to say, an MRI machine, in the same way a dripping faucet is way less water than a garden hose. But if you leave the dripping faucet on long enough, your water bill is going to go up.