Vodka and Wine are not my areas of expertise at all, but I may have an idea still.

For ourselves, the food crate delivery subscriptions that deliver a new weekly box with food has been a massive success for us in terms of introducing us to new foods and recipes that we normally never touched (or even knew about. As old habits die hard, it can be hard for many to go outside of what they're used to and try something new, but this then turned that upside down for us, where we now love trying new things, and then repurchase what we liked the most afterward.

I know that subscription services like this exists in the US where people pay a monthly subscription in order to receive a box of different wines every month. Both for the convenience, but just as much to discover new and exotic wines. Now, there may be some costs involved with getting in the boxes of these companies, as they are basically providing easy promotion for the wine suppliers.

However, they also need to find new and more rare and exotic wines to provide a better experience to their paying customers. So I would imagine that there is still room for a good deal to be made.

In any case, this could reach a lot of people, and those you reach would be those naturally seeking new wine experiences. So perhaps it is worth a shot?

You may want to look up these companies yourself and shoot them a message, here's an overview that I found on Forbes:
https://www.forbes.com/sites/forbes-finds/2017/11/17/best-wine-delivery-subscription-services/