What are the nipples made of?

Thank you for your inquiry. The Dr. Brown's nipples are made of silicone.

The box i received says it comes with 2 level 2 nipples and 2 level 3 nipples but all the nipples i received has a 1 on them. are they level 1?

That is correct. If it says 1 they are size 1.

What’s the difference between the narrow neck and wide neck?

Thank you for your inquiry. The only difference in the standard and wide neck bottle is the nipple. Some babies will prefer one style over the other and some babies do not have a preference and will take both. Both bottles function the same with the venting system in the bottle helping reduce gas, spit-up, burping and colic.

Can they be used without the anticolic straw without leaking?

Thank you for your inquiry. The Dr. Brown's Options PLUS bottles can be used without the vent. If you notice a change in the bottle function after removing the vent, we would suggest going up a nipple level to support this.

Model number	SB06003
Product Dimensions	11.43 x 17.78 x 26.42 cm; 453.59 g
Material	Glass
Additional product features	Dishwasher Safe - Top Rack Only, Glass Bottle Starter Set
Batteries	No
Bottle nipple type	Vented
Bottle type	Anti-Colic Bottle
Item Weight	454 g

Natural Flow® Anti-Colic Options+™ Narrow Glass Baby Bottle Starter Set with Silicone Glass Bottle Sleeves, Baby Bottle Brush and Soft 100% Silicone HappyPaci™ Pacifier for Newborns

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