Dipping Dots

Has anyone had or heard of anyone having dipping dots at their wedding? From their online prices it seems reasonable and it comes with cups and spoons. The only thing I worry about is the dry ice. It says that you can't store them in a normal fridge. I think it would be a fun extra thing to do! It comes in a reusable cooler. I am wondering if anyone knows anything about dry ice. I am assuming I will have to buy more locally to keep the dipping dots cold. Unsure of how long the ice stays good for, exc. Is this a bad idea?? LOL