From an archaeological dig at Veliki, Novgorod, courtesy of Russia-ic:
"A group of archeologists carrying out diggings in Veliki Novgorod have found several ancient feeding bottles for babies. The finds were discovered at the digging site in Mikhailova Street. Here the archeologists found wooden feeding devices made of cow horns. The Slavs used to attach leather sacks with milk to the broad ends of hollow horns and their babies would suck the milk through holes in the narrow part of horns. It is interesting to note that not far from the archeological excavation site there is a working municipal kindergarten. "