"Initially I was only going to buy 2 of these but decided to go ahead and get 4. I'm glad I did because as they were filling the balloons at my local floral shop, one wouldn't stay filled and before an hour passed was laying on the floor barely holding it's shape.
About 5 hours after filling, a 2nd balloon was loosing it's helium as well.
3 made it through my son's party and only 2 are still full the next day."