Where can I find cups directly earmarked for seniors? Thank you.

I used an insulated coffee mug for Mom. The top snapped on and where the sip whole was I put a straw. She got to the point she couldn't see the hole because the lid was black. Plates could have curved sides. Easier to push food against.

Many medical equipment websites have adaptive dishes and eating utensils.

Not sure what you are looking for but at one point we got Mom a sippy cup and it worked very well. Mom also got a kick out of it, we just made jokes and mad her laugh like it was a joke but she loved to use it.

What kind of features are you looking for? You might try looking for adaptive tableware or adaptive eating utensils on the web.