Still, sparkling and fruit wine
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Still wine
The default. A narrow-neck bottle, a cork or a screw cap, and the whole of the craft in what is inside. The archetype describes it exactly: a bottled beverage, narrow neck, crown or continuous thread closure.
Sparkling wine
Carbonated or bottle-fermented, and under real pressure. The bottle is thicker, heavier and shaped to handle it, and the closure is a cork and cage or a crown rather than a thread.
Which is why nothing here serves it
A sparkling wine bottle is a pressure-rated glass product from a glass house. There is no equivalent on a packaging catalog shelf and pretending otherwise would be unsafe rather than merely unhelpful.
Fruit wine
Made from fruit other than grapes, and it is where a lot of small production starts because the raw material is available and cheap. Its class and type designation is its own question.
And its labeling is where people trip
What a fruit wine may be called, and whether a grape-wine term may be borrowed for it, is a designation question rather than a marketing one. Settle it before the name.
All three share the sulfite question
Ten parts per million is the threshold and fermentation itself produces some. Testing is the route to knowing rather than assuming either way.
And all three share the warning
The Government Warning applies to every alcoholic beverage. Type size by container volume, on a contrasting background, separate from everything else.
Start still
Lower capital, no pressure, a wider choice of container and a shorter route to a sellable product. Sparkling is a second product, not a first one.
Pressure is a safety question, not a preference
A bottle not rated for the pressure a secondary fermentation produces can fail, and fail violently. This is the one place in this library where using the wrong container is dangerous rather than merely wrong.