This is a simple funnel for the iTouchless brand motorized salt and pepper grinders. I believe this same model is sold under several different brand names, so it may fit others.
The funnel fits snuggly into the 22mm keyed opening and lays flat on the top surface so it doesn't need to be held while using. This allows you to use both hands for the pouring - especially helpful when dealing with a salt bag.
I printed using Maker Geeks PETG with the large mouth of the funnel on the bed. I added a small brim to help with adhesion, but you may not need it.