I'm much appreciated your questions about my business idea!
Here come my answers to your questions.
1.We are used to putting ice cubes in wine too.But granite cubes have more merits than ice cubes.They won't dilute the flavors when they cool down drinks.In addition,stones can be heated,the highest temperature can be 200 degrees and the lowest can be -20 degrees.A glass of wine only needs a stone cube to get heated or refrigerated instantaneously.Isn't that cool?Temperatures of stone cubes can be stochastically set according to needs of different drinks,these are impossible for ice cubes.Think about the difference below:there is one granite cube in a glass of wine,but there are some ice cubes in one.
2.We can totally understand your consideration about the security of the granite cubes.But I'd like to tell you that the granite we use in drinks are no pollution and we have pass the European standard: EN71 Part 3, Foodgrade, Radiation, REACH SVHC. Certification,so please be assured to use them.Meanwhile,our employees have tried them before we put them to sell.
3.About the choke problem,all we can do is to put labels about this serious hidden danger in the instructions.Thank Kay's remind.But attention this,each granite cube is approximately 2cm to 2.5cm.It's not easy for everyone to swallow like ice cube when he's boozing.
4.Everything is worth trying.Imagine that our granite cube is one diamond in your glass(not just an ice cube),your heart will love it.lol
Hope you like my answers.Any advice is welcomed.