It is recommended to choose the bottle by reputable manufacturers – they are made of materials with proven quality, and therefore safe to the health of the child. Their cost is usually higher than bottles of an unknown brand, but that's exactly the case when it does not skimp on quality.
The amount will depend on the age of the baby – the newborn enough 100-125 ml, and the older child will fit bottles from 200 ml. For young children, pick up a bottle with controlled dummy system, equipped with special valves that prevent swallowing excess air.
Glass bottles are more durable than plastic, does not grow turbid and do not scratch, can withstand more sterilizations, but since they are fighting, they are best used while a child is very young and his feeding mother. With 3 months when the child starts trying to hold bottle on their own, better go to plastic. When choosing plastic bottles for feeding pay attention to the material: it should be a polypropylene, polycarbonate or polyamide are also suitable Tritan. In these plastic types does not contain harmful bisphenol-A.
The shape of the bottles surprising variety. Direct "classic" it is easier to wash, but narrowed in the middle or finned easier to keep the baby. Curved bottle feeding is more physiological, as the curves of the breast; note the anatomical bottle-hemisphere offered by some manufacturers. Their form is so close to natural that these bottles are recommended for children in order to avoid refusal of the breast. Intricate "bagels" very easy to keep the children, but difficult to wash. Baby bottle with removable handles are easy for grown up kids who are learning to drink by themselves.
Better to buy a bottle of the same manufacturer, diameter and thread of the neck they have the same, they fit the same nipples.