Berjuan Toys' "Breast Milk Baby" comes with a special halter top, ABC News reports.
The top has two flowers where nipples would be. When the doll's mouth is brought to a sensor in the flower, it makes suckling motions and sounds.
Dennis Lewis, Berjuan's U.S. spokesman, said, "There have been people who have called us pedophiles, they've called us perverts, they've said we're endangering little girls.
"Breast-feeding was a normal part of life before a few greedy pharmaceutical companies tried to make it rich selling artificial milk," he said. "A girl who plays with a breast-feeding baby now will think this is the normal way to feed a baby."
"Now that underage sex and pregnancies are reaching shocking proportions, let's have a doll which encourages children to ... get pregnant!" wrote one poster on "Good Morning America's" Facebook page.
But child psychiatrist Ned Hallowell said, "I don't think it's sexualizing any more than a little boy standing next to his father shaving and putting on shaving cream."