A  Feeding bottle is a bottle made of PET material or glass  with a nipple (also called a teat in the UK) to feed infants and young children when a mother does not breastfeed, or if child  cannot conveniently drink from a cup. A feeding bottle is used to feed either infant formula or expressed breast milk or pediatric electrolyte solution.

Feeding Bottle consists of a bottle itself, a nipple or teat, a ring to seal the nipple to the bottle, a cap to cover the nipple and optionally a disposable liner or carrying case.

The height-to-width ratio of bottles is high (relative to adult cups) because it is needed to ensure the contents flood the teat when used at normal angles; otherwise the baby will drink air. However, if the bottle is too tall, it easily tips. There are asymmetric bottles that ensure the contents flood the teat if the bottle is held at a certain direction.