M.D.
Instead of the suction, I recommend starting out with a paper plate and then transitioning to plastic. I use the Pottery Barn Kids plates for my little one and did with my older son as well. I used the paper until he seemed to be leaving it on the table a little more consistently and now when he decides to pick it up, we take it away and say no. Learning table manners begins now, as they say...it's good times! :)
Good luck.
-M