Will these only fit the options bottles?

The bottles themselves are all the same. So these will fit any bottles. I’m not 100% sure if the cap that holds the nipple will fit from the natural flow, but I’m sure it will.

will these fit evenflo bottles?

Thank you for your inquiry. We have not tested the Dr. Brown’s Natural Flow® Options+™ Replacement Vent Kit, 2-Pack, Narrow in an evenflo bottle.

Can someone please tell me what these pieces are called?

The parts in this post are the travel disks, reservoir tubes and vent inserts.

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🍼 Keep the natural flow going—never miss a feeding moment!

COMPLETE KIT - Includes 2 vent inserts, 2 reservoirs, and 2 travel discs—everything you need in one pack.
HYGIENE FIRST - Top-rack dishwasher and sterilizer safe for effortless, germ-free cleaning.
BPA FREE ASSURANCE - Safe, durable plastic designed with your baby’s health in mind.
SEAMLESS REPLACEMENT - Restore your Options+ bottle’s natural flow with precision-fit vent parts.
PERFECT COMPATIBILITY - Exclusively engineered for Options+ Narrow 8oz/250mL bottles—no guesswork.

Dr. Brown's Natural Flow Options+ Replacement Vent Kit offers a precise, hygienic solution to replace worn or lost vent parts for Options+ Narrow 8oz bottles. This BPA-free, dishwasher and sterilizer safe kit includes all essential components to maintain the bottle’s patented natural flow system, ensuring your baby’s feeding experience remains smooth and comfortable.

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€ 12.61

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Brand Name	Dr. Brown's
Model Info	SR203-P4
Item Weight	1.44 ounces
Product Dimensions	1.6 x 4.3 x 9.6 inches
Item model number	SR203-P4
Is Discontinued By Manufacturer	No
Capacity	8 ounces
Part Number	SR203-P4
Special Features	Dishwasher Safe - Top Rack Only
Color	Clear
Material Type	Plastic
Included Components	Inlet Hose
Batteries Included?	No
Batteries Required?	No

Dr. Brown'sNatural Flow Options+Replacement Vent Kit, Narrow, 2 Count (Pack of 1)

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