Ever heard about
Zamplebox? Is it any good?
Oh dear god stay away from that.
I did it with the girlfriend for a while. First few boxes were okay, had some recognizable juices. Then, they started sending what seemed like whatever they had on hand.
They don't give a shit about the flavor profile they ask you to create, and the owner sends juice from other companies he owns, extremely shitty juice. He came under a LOT of fire on Reddit when he was found out for that, and mostly everyone stays away from that company.
Though there are a few really good ones out there, the best option I can recommend is
Craft Vapery. They actually try hard to send you juice according to your flavor profile and have really good juice, and sometimes they put in one of their own in-house juice bottle but unlike Zamplebox it is amazing! It's also the best cost efficient subscription box I've seen so far, there are a few other ones like Zodist, Juice Crate and Drip Club but I haven't tried any of those.
Also, another great thing with Craft Vapery is that you can search their shop for specific flavors and mark them to show you'd like them in your box, and most of the time they'll send it to you in your next box!