I'm surprised by how durable these balloons are. They have a beautiful and unique shape, and they're from Katiuscia Balloons. This is my first time using them. I used two balloons from their large collection, one for B2P and one for S2P. I must admit that the sit-to-pop wasn't easy, and I liked that, as it allowed me to bounce it a lot before it popped. I even inflated and deflated it about three times before the big burst...