While the best jar openers for older people can just about open any jar lids, not all of them, however, can open smooth or plastic lids. This is because the smoother lids are harder to grip, and you will need to read the product description to check whether this particular model is capable of opening those lids. As for the plastic lids, they are not sturdy enough for the teeth or jaws of the jar opener. If this is a dealbreaker for you, you’re probably better off finding a jar opener that can open all types of lids.