Which Philips Avent Natural Nipple do I own?

Both the previous and new Philips Avent Natural Nipples are designed to look and feel like a breast, but only the new Natural Response Nipples are also designed to work like one, releasing milk only when your baby actively drinks.The Natural Response Nipple comes in 5 sizes, and they can be recognized by the following features:•    Slit on the tip of the nipple instead of a hole;•    Swirl design around the petals;•    Grey Philips Avent logo on the bottle.To check whether you have the older or new Natural Response Nipple, please refer to the illustration below.

Avent Natural Nipples Teat II 3m+ / Variable PK2 - SCF655/23

Philips Avent Avent Natural Fast Flow nipples (6 months plus, 2

Silicone Nipple Philips Avent Classic+ adjustable flow, 1 slit 3m

Buy Philips Avent Natural Nipples for New Born, 0+ Months (Pack of

Baby Product CLEAR Philips Avent Natural Nipple, Packaging Type

Philips AVENT Natural Baby Bottle Nipple Fast Flow Nipple 6M+ 2pk

Philips AVENT Natural Baby Bottle Medium Flow Nipple 3M+, One Size

Philips AVENT Natural Response Baby Bottle Nipples Flow 5, 6M+

Philips Avent Natural Medium Flow Teat 3m+ (3 Hole) - 2 pcs/pack

Philips Avent Natural Nipple Teat Pacifier 0m/1m/3m/6m/9m (Newborn

What are tips for transitioning from the previous Natural nipple