Filling these bubble balloons is not like filling a regular latex or orb balloon but don't worry if you're new to bubble balloons - they're fairly straight forward.
You'll find that the opening is much wider than regular balloons - this is so that they can be filled (feel free to add your own fillings - maybe confetti or feathers? Just get in touch and we can source them for you). To fill, hold the opening of the balloon tightly around the nozzle of your helium tank or air pump and fill as normal. Don't worry about the initial shape of the balloon, it will expand to be round. Keep filling the balloon until there are no seems and you have a nice round shape. Once you've reached the desired size then twist the end as if you're twisting thread. Keep twisting until you effectively have a string - then simply tightly tie up the end of the balloon with this end (alternatively you can use balloon ties as long as you tie them tight enough).