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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Boon Nursh Straw Cup Conversion Tops for Bottles | 2 Count, Silicone Straw, Spill Proof Seal, Flip Top Cover, For Use With Boon Nursh Bottles, Top Rack Dishwasher Safe

Boon Nursh Straw Cup Conversion Tops for Bottles | 2 Count, Silicone Straw, Spill Proof Seal, Flip Top Cover, For Use With Boon Nursh Bottles, Top Rack Dishwasher Safe

Product ID: 299104890

Details

Brand
Boon
Color
Clear
Item Weight
0.12 kg
Material
Silicone
Style
Straw Sippy

🔒spill-proof valved seal

🥤100% silicone straw

🧼top rack dishwasher safe

NZ$33

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Sold byAmazon New ZealandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🥤 Elevate your toddler’s sip game with spill-proof silicone style!

FLIP GO HYGIENE - Rotating flip-top cover keeps the straw clean and protected between sips.
NO MESS NO STRESS - Innovative valved straw creates a spill-proof seal—say goodbye to leaks on the go.
CLEAN READY IN A SNAP - Top rack dishwasher safe design means effortless cleaning for busy parents.
SEAMLESS TODDLER TRANSITION - Transforms your Boon Nursh bottle into a toddler-friendly straw cup—smart parenting hack!
SILICONE SIPPING PERFECTION - 100% beverage-safe silicone straw ensures pure, safe sipping every time.

The Boon Nursh Straw Cup Conversion Tops are silicone straw lids designed to convert 8 oz Boon Nursh baby bottles into spill-proof toddler sippy cups. Featuring a 100% beverage-safe silicone straw, a valved spill-proof seal, and a rotating flip-top cover, these lids keep drinks secure and straws clean. Dishwasher safe and easy to use, they provide a hygienic, convenient transition from bottle to straw cup for toddlers.

Specifications

ASIN	B08ZH9H35L
Best Sellers Rank	#3,733 in Baby ( See Top 100 in Baby ) #107 in Toddler Cups
Brand Name	Boon
Closure Type	Flip Top
Color	Clear
Customer Reviews	4.0 4.0 out of 5 stars (2,345)
Included Components	2 Silicone Straw Conversion Tops
Item Type Name	Silicone Straw Conversion Top
Item Weight	0.12 kg
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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NZ$33

Duties & taxes included

In stock

Sold byAmazon New ZealandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to New Zealand.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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