This a personalized helium balloon, the product will as the same as the video when you receive it.
Q&A:
-How long it will last?
-5-7 days, keep it in a cool place and keep away from any sharp objects. 
-What should I do if it was burst when I open it?
-Please let us know once you receive it. We will not responsible for any BURST after you receive it.
-How many letters I can add to the balloon ribbon?
-5 maximum. As the letter is made of paper, it will be too heavy if it is more than 5 letters.
-If I order a balloon set will I able to get two personalised balloons?
-No, only one ribbon will have personalised letter.