Recipe sounds good and bottle looks cool.
Maybe use a 60's space-like typeface for the writing under Balls to further your space theme? E.g.: https://www.canva.com/learn/wp-content/uploads/2016/05/image29-2-tb-800x0.jpg
If you're in it for it to be a hobby that maybe pays for itself, with the possibility of making a small profit, then go for it.
However, if you truly want it to be a business venture, then a good marketing starting point is determining who/where your market is. Your fam and friends are great...
My experience is that if someone from work wants to buy something that you did not overtly advertise to sell, then they are genuinely interested and will be more than fair on what they pay. If you just want to get rid of it, let him know of a general market estimate and they will pay that.
Get a ph tester, which are easily procured via amazon and not very expensive. Test it and play with the recipe until you get the right PH balance. A guide for proper PH range for shelf stable foods is readily available on this site and all over the internet.