Every baby is different and will require different flow rates at their own pace and stage. Our suggested age & flow rates are the following:

Slow Flow: 0+ months

Medium Flow: 0+ months or 1+ months

Fast Flow: 6+ months

You can find our suggested flow rates on each NUK® bottle packaging. Remember, everything is dependent on your baby's development.

Make sure that you are choosing a bottle with an anti-colic feature. All NUK bottles feature an innovative Anti-Colic vent system which helps to reduce the risk of infant colic. The valve allows air into the bottle during feeding which prevents an air vacuum and allows baby to feed continuously without swallowing air. In addition, always ensure your baby has a good seal around the nipple to prevent baby from swallowing air from the sides of their mouth.

BPA or Bisphenol A is a raw material used in the manufacture of the synthetic material, polycarbonate (PC). PC is used in various everday items such as plastic bags, phones, CD's and adhesives. Numerous studies have been conducted to identify the dangers of BPA intake with inconsistent and inconclusive results. However, as a safety precaution, all NUK bottles, pacifiers, cups and tableware are BPA-free.

Bottle nipples and replacement nipples are interchangeable within NUK product lines: NUK® Simply Natural™, NUK® Perfect Fit™ & Gerber® First Essentials™. NUK Simply Natural nipples are interchangeable among all Simply Natural tritan 5oz or 9oz bottles and 4oz or 9oz glass bottles. NUK Perfect Fit nipples are interchangeable among 5oz and 10oz Perfect Fit bottles, 5oz and 10oz Perfect Fit Learners and NUK soft spout and hard spout Active Cups. Gerber First Essentials nipples are interchangeable among 5oz and 9oz First Essentials bottles.

Both nipple materials have their own special characteristics. NUK® silicone nipples are made of a high-quality polymer synthetic material. This transparent silicone is heat and age-resistant and very easy to clean. Latex is a natural rubber product that is flexible, bite and tear-resistant. Since latex is a natural material, edible fats and exposure to direct sunlight may age it somewhat quicker than silicone. Which material you choose depends on your individual wishes or preferences and those of your baby too. Of course, you can always switch from one type to the other.

No, NUK Latex nipples fit most ready to feed, single-serve formula bottles.

No, Gerber First Essentials latex nipples can only be used on Gerber First Essentials 5oz or 9oz bottles.

Yes, NUK® Simply Natural™ glass bottles are available for purchase.

NUK and First Essentials™ Bottles are dishwasher-safe, top rack only. This includes all parts of the bottle: bases, nipples, rings and caps.

Most NUK® bottles and products are recyclable and are marked with the recycle symbol. Please note that Tritan bottles are not recyclable.


Graco Children’s Products Inc. (“Graco”) stands behind its products and quality controls and guarantees complete customer satisfaction with your NUK product purchased from us or our authorized sellers.  If you are not satisfied with your NUK product, please fill out our contact us form and provide a description and photos of your product, and we’ll work to make it right. You must make your request within 45 days of the date of purchase.  Please note that because we are unable to control the quality of our products sold by unauthorized sellers, unless otherwise prohibited by law, the Satisfaction Guarantee is not available for products purchased from unauthorized sellers, including unauthorized internet sites. The Guarantee is also limited to the original, end-user purchaser in the United States.

How To Claim The Guarantee

To submit a Guarantee request, please fill out the contact us form. Please have information available regarding where and when you purchased your product, your reason for dissatisfaction, and proof of purchase. Please note that you may be asked to submit photo(s) of your product, provide proof of purchase, and provide other information to assist us in processing your request. You must submit your Guarantee request within 45 days of the date of purchase.

Guarantee Guidelines

Graco reserves the right to verify information, require a valid proof of purchase, and to deny Guarantee requests in its discretion in cases of suspected fraud or where Graco concludes that the purchaser has abused the Satisfaction Guarantee. We may amend or terminate the Satisfaction Guarantee at any time without notice. If you have any questions regarding whether a seller is an authorized seller of our products, please contact us through our form or at 1-888-NUK-1238.

Effective: June 1, 2024

For hygiene and safety reasons, we recommend replacing nipples after 2 months or if any tear or crack appears.