This wine is round, you say? Actually, it’s sort of whatever the shape of the vessel it’s in. Wine is a liquid, after all, so it assumes the shape of its glass or bottle. It’s a law of physics (number 3 or 4, I think).
Yeah, I know that you mean “it fills the mouth in a soft, seamless way,” so why don’t you just write that? Well, primarily because that’s more characters and I’m lazy, and it gets boring to write the same thing for every wine, for both me and the reader -- so I’m just looking out for your best interests!