The Shapeways printers can only print one material at a time. You can't co-mingle different materials into a single model.
If your model can be printed as separate peices, then you can set them up as separate models, and then order the different peices in the different materials.
Shapeways also doesn't have any material like rubber.
Color? The Strong&Flexible material (Nylon) can be dyed in a range of colors that you can see on the Materials page.
Full Color Sandstone is exactly what it sounds like.. It's got the full range of colors (like your inkjet printer), but it's finish is very rough and is made of gypsum - not plastic.
It sounds a bit like you're thinking of some food storage/handling item.. only the ceramic material here is rated for foods.. the other materias are inappropriate for food.
===
You must maintain/manage your own IP rights. If it matters that much, get a patent first. If you keep the model private, Shapeways will not allow anyone to see it, and it will remain private, but if you make it public, then anyone could copy the concept, and Shapeways offers no protections from others copying the idea.