Philips Avent Natural Response Set of 3 bottles & brush. 

• A new generation of feeding bottles and teats: Avent Natural Response 
• Starter kit containing 3 bottles and a bottle brush
• Bottle 125 ml teat size 0+ (from 1 day of life) (model 2)
• Bottle 260 ml teat size 1+ (from 1 month of age) (model 3)
• Bottle 330 ml teat size 3+ (3 months old) (model 4)
• When the baby stops sucking, the milk stops flowing
• The baby drinks, swallows and breathes completely naturally, just as if sucking at the mother's breast
• This system supports the combination of natural feeding with bottle feeding
• Does not contain bisphenol A (BPA)