Are the straws made of silicone?

No, the straw part is a hard plastic, only the top is silicone.

Can you boil the sipper cap for sterilizing?

I don't know about boiling the sipper cap. I do wash it in hot soapy water and use a small brush to scrub it.

Are these for the f400 or f401 models of thermos funtainers?

F401. The F400 tops fit differently and straws are longer.

Do these fit the funtainer f402 bottles?

I don’t know what the f402 is, but they fit the 12 oz funtainer cups.

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Marbe 6pack Replacement Straws for Thermos Funtainer Bottle, Straws Stem Set with Cleaning Brushes，Safe to use for Adult/Children (6 Straws+3 Cleaning Brushes),White

Marbe 6pack Replacement Straws for Thermos Funtainer Bottle, Straws Stem Set with Cleaning Brushes，Safe to use for Adult/Children (6 Straws+3 Cleaning Brushes),White

Product ID: 232780361

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Details

Material
Silicone
Color
White
Size
6 pack
Special Feature
Reusable
Brand
Marbe
Unit Count
6.0 Count

🧴6-pack silicone straws

🧼3 cleaning brushes included

♻️BPA-free & reusable

Description

🥤 Sip smart, stay sustainable, and never miss a refresh!

SAFE FOR ALL AGES - Crafted from non-toxic, odorless silicone—ideal for both adults and kids without compromising taste.
EFFORTLESS CLEANING - Includes 3 specialized brushes to maintain hygiene and extend straw lifespan with ease.
LEAK RESISTANT DESIGN - Silicone seals flat to prevent leaks—just avoid overtightening the cap for flawless hydration.
SATISFACTION GUARANTEED - Risk-free purchase with 100% after-sales refund policy for total peace of mind.
PERFECT 6 PACK REPLACEMENT - Keep your Thermos Funtainer fresh with 6 durable silicone straws designed for daily use.

This 6-pack set of white silicone replacement straws for Thermos Funtainer bottles includes 6 durable, BPA-free straws and 3 cleaning brushes. Designed for safe use by adults and children, these odorless, reusable straws ensure a clean, leak-resistant drinking experience. Backed by a full satisfaction guarantee, they’re the perfect eco-friendly upgrade to your hydration routine.