I have the 4 oz bottles, can i just cut the straws to fit or is there another shorter straw conversion set?

They don’t make straws for the 4oz bottles since the smaller size is generally used for younger infants. The straws have bite valves at the top so are more suitable for 9months + of age for which a child is usually using a larger bottle. To answer your question - technically you could cut the straw.

Is this a direct match for the grey boon nursh?

the straw top fits all of the silicon pouch bottles (4 and 8 ounce or all colors). Our daughter loves them and it makes the bottles usable for a lot longer.

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NURSH Silicone Straw Conversion Top, Straws for NURSH Baby Bottles, 2-Pack,2 Count (Pack of 1)

Product ID: 353710160

Details

Brand
Boon
Colour
Clear
Material
Silicone
Product dimensions
25L x 30W
Style
Straw Sippy

🚫spill-proof valved straw seal

🧴100% beverage-safe silicone

🧼top-rack dishwasher safe

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฿1546

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🥤 Sip smarter, spill never—upgrade your toddler’s drink game!

HYGIENIC FLIP TOP - Keep straws clean and germs away with a rotating cover that locks in freshness between sips.
EFFORTLESS CLEANING - Dishwasher-safe design means less hassle and more time for what really matters—quality moments with your toddler.
NO SPILL CONFIDENCE - Transform your NURSH bottle into a spill-proof sippy cup with a smart valved straw seal—perfect for on-the-go parents.
SILICONE SIPPING SAFETY - Enjoy peace of mind with 100% beverage-safe silicone that keeps every sip pure and toxin-free.
SEAMLESS TODDLER TRANSITION - Easily convert baby bottles into toddler-friendly straw cups, making every stage of feeding smooth and stylish.

The Boon NURSH Silicone Straw Conversion Top is a 2-pack of spill-proof, 100% beverage-safe silicone straw lids designed to convert NURSH baby bottles into hygienic, toddler-friendly sippy cups. Featuring a valved straw seal to prevent leaks, a flip-top cover for cleanliness, and dishwasher-safe materials, these lids support a smooth transition from bottle to straw cup while ensuring durability and ease of use.

Specifications

ASIN	B08ZH9H35L
Best Sellers Rank	#7,666 in Baby Products ( See Top 100 in Baby Products ) #178 in Sippy Cups
Brand Name	Boon
Closure Type	Flip Top
Color	Clear
Country of Publication	China
Customer Reviews	4.2 4.2 out of 5 stars (2,243)
Included Components	2 Silicone Straw Conversion Tops
Is the item dishwasher safe?	Yes
Is the item microwaveable?	Yes
Item Dimensions L x W	25L x 30W millimeters
Item Type Name	Silicone Straw Conversion Top
Item Weight	0.12 Kilograms
Manufacturer	TOMY Intl.
Manufacturer Part Number	B11498
Material Type	Silicone
Model Number	B11498
Number of Pieces	2
Product Style	Straw Sippy Cup Lid
Shape	Round
UPC	669028114986
Unit Count	1 Count

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