Have you thought of making a double-ended dildo?

There aren’t many double ended silicone toys being made, except for a few companies doing them in hard silicones with seams all around the center of them.

When most people ask for a double-ended toy, I find what they are really wanting is a toy that’s long but smooth on both ends for full insertion.

The primary reason you don’t see that form in silicone is that silicone can’t be melted or glued together once it has cured, so there’s no opportunity to join or melt seams after manufacture, and in order to get a long double ender out of a mold there has to be an exit somehow, and that’s where the seam comes in.