Perfect for decorating under the sea, frozen and mermaid themed birthday parties, baby showers, it's a boy and gender reveal celebrations this awesome clear blue bubble round balloon is an impressive decoration both when used alone or combined with other balloons to create magical displays. This large pale blue transparent globe balloon is a wonderful choice for weddings and larger or corporate events and can be personalised by filling with foliage, feathers, small balloons or confetti.these bubble balloons are made of poly plastic and include a self sealing valve. They are pre stretched and easy to inflate to approximately 46cm 18 using a latex regulator.suitable for inflation with helium. To inflate your balloons, you will need to purchase a helium cylinder for 30 balloons or helium cylinder for 50 balloons. Many florists also offer an inflation service for a small fee.