nuk simply natural nipples

The product descriptions list the nipples as made from silicone and state they are BPA‑Free in the product details.

Listings show multiple flow options: Slow (Level 1), Medium (Level 2), Fast (Level 4) and a Universal self‑regulating flow. Age labels vary across listings (for example, Slow is shown as 0M+ in some entries, Medium as 1M+ or 6M+ in others, and Universal as 6M+), so check the specific product listing for the exact flow/age labeling.

Product descriptions list compatibility with NUK Simply / NUK Simply Natural bottles. Separately, Smooth Flow replacement nipples are noted as compatible with NUK Smooth Flow Pro bottles. Check the specific listing to confirm compatibility for the nipple style you select.

Descriptions state the nipples are very soft silicone (some listings call them '2x softer' than leading brands) and have a wide, deep nipple shape intended to mimic breastfeeding. These design claims are presented to support a natural latch and easier breast‑to‑bottle transitions; they are marketing descriptions, so check the listing for exact wording.

Most listings show these replacement nipples sold as a 2‑pack (product titles often include '2pk' and package quantity is listed as 2). Verify the pack quantity on the product page before purchasing.