You are... 150 years old? https://patents.google.com/patent/US454138A/en https://patents.google.com/patent/US454138A/en This nipple is adapted for insertion i

You are... 150 years old? https://patents.google.com/patent/US454138A/en https://patents.google.com/patent/US454138A/en This nipple is adapted for insertion into the ear, and is ordinarily covered with a rubber cover to lessen the friction against the orifice of the ear.