Helium is very expensive, but there are other options for making a dazzling balloon display! Balloons look just as fab hung from the ceiling using clear fishing line, this is very effective with large 36" balloons like ours.
Balloons can last for years if stored properly. Please keep balloons away from continuous exposure to extreme temperatures. If exposed to sunlight for a period of time, you may refrigerate till the balloons cool off, before inflating. Likewise, do not inflate frozen or stiff balloons. Allow to naturally warm up before inflating.