Good balloons

The balloons were delivered quickly and were perfect. I've pumped up with a separately purchased helium bottle, 1l gas enough for about 4 this balloon. They were bulging with filling about 3 weeks, after which they began to lose air, but my hovering for more than 4 weeks are still on the ceiling. Since the helium in small bottles is not cheap, however, it may be cheaper overall, so to buy a balloon from a street vendor (per piece would cost me 6). This has nothing to do with the delivered balloons, so 5 stars.