For a long time I played with mspoodle's mod that unlocks these stencils, but I didn't like that they were copies of the objects, making my buy catalog more cluttered. That's why I made my own version of the mod.

Basically, each candy container had its own candy inside. I just enabled all three containers to share textures from each other.

I also changed all three candy bins to be available in Buy Mode under * by Function: Decoration > Misc. * by Room: Dining Room > Misc. Decor * and enabled them for medium and large slot placement

This mod requires Katy Perry Sweet Treats. If you don't have it, I recommend trying out mspoodle's version instead.