I am not a graphic artist or a mathematician, so in order to create a template for covering the Sweet Cup, there is no alternative but to de-construct one. I then lay it flat in order to trace the arc and scanned it. I extended the cup by 1/4 " to allow for an overlap. There are no score lines. You will find that if you cut along the traced line, there will be of an overhang at the bottom. I prefer to then trim the excess off from the base of the cup afterwards for a neater finish.
Alternatively, you can cut inside the line, but cutting by hand isn't as precise as using a die cutting or a trimmer, so I prefer to have too much paper than too little.
So that you don't have to cut up yours, here's a template I created from the one I de-constructed. I tested it on my printer and it was true to size - I hope it works on yours too, otherwise you'll have to cut up one of yours too. Fingers crossed!