Well, I would consider a humidor pack- although it is Martyn's idea and I'd have to get his clearance to do so.
Having said that, Martyn's exact solution would be yet another layer of packaging cost I'd have to face and, right now, I'd like to focus on getting the new product off the ground.
I probably could find a way of bundling all the flavours without invoking the cost and I'll have a think about this, thanks.
Thanks also for the kind remarks about the site. It seems to work very smoothly and people seem to like it. Can't say fairer than that tbh