Can you not store milk in these? Looking for a way to keep my son's soy milk cold without lugging an ice pack.

You can definitely put milk in this thermos, but to keep it ice cold you need a water bottle ice pack (the myColdCup ones on Amazon). These work really well because the ice pack is put *inside* the thermos (rather than a bulky ice pack outside), so it does not need to be nearly so big to have the same cold effect. One ice pack in this 12 oz thermos will keep the milk really ice-cold for more than 8 hrs. He will love it!

Can this bottle be filled with hot water and keep the water warm for hours?

No. It says that ON THE BOTTLE. It’s not for hot liquids

is this bottle leakproof?

Yes, is is leakproof. If the top is screwed on correctly (not misthreaded) and the straw is pulled through tight, it will NOT leak. The few times we’ve had it leak is due to user error. Though it will obviously leak (little dribbles) if the top is not closed and the bottle is turned upside down or laid on its side. For reference, we’re probably going to buy this for the third time in two years because it keeps getting lost. It’s leak proof and easy to clean (no mold).

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THERMOS FUNTAINER Water Bottle with Straw, 12oz, Butterfly Frenzy | Kids Stainless Steel Insulated Water Bottle, Keeps Drinks Cold Longer for School & Play, BPA-Free

Product ID: 444873365

Details

Brand
THERMOS
Capacity
12 ounces
Color
Butterfly
Recommended Uses For Product
Water
Special Feature
Cold 12 Hours

💧Removable, hygienic straw

🔒Leak-proof push-button lid

❄️Keeps drinks cold 12 hrs

€ 40.03

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

❄️ Sip in Style, Stay Cool All Day!

STAY CHILL ALL DAY - Vacuum insulation locks in cold for up to 12 hours—hydration that keeps pace with your kid’s busy day.
CLEAN SAFE ALWAYS - Removable, covered silicone straw and dishwasher-safe design make hygiene effortless and BPA-free materials keep it safe.
BUILT TO BRAVE THE ROUGH - Durable 18/8 stainless steel construction resists drops and dings—because kids don’t do delicate.
KID APPROVED CONVENIENCE - Lightweight, compact design with an easy push-button lid and soft-touch carry handle for on-the-go grip and quick sips.
TRUSTED LEGACY MODERN STYLE - From a brand with 120 years of innovation, this fun Butterfly Frenzy pattern blends timeless reliability with playful flair.

The THERMOS FUNTAINER 12oz Butterfly Frenzy water bottle combines advanced vacuum insulation to keep drinks cold for 12 hours with kid-friendly features like a leak-proof push-button lid, removable hygienic straw, and durable stainless steel build. Lightweight and compact, it fits easily in backpacks and cup holders, making it the perfect hydration companion for school and play. BPA-free and dishwasher safe, it’s a trusted, stylish choice backed by Thermos’ 120-year heritage.

Specifications

ASIN	B09WG64Y5V
Additional Features	Cold 12 Hours, Double Wall, Push Button Lid, Vacuum Insulated
Age Range Description	Kid
Base Diameter	2.7 inches
Best Sellers Rank	#13 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #6 in Insulated Bottles
Brand Name	THERMOS
Cap Type	Flip Top Cap
Capacity	12 ounces
Color	Butterfly Frenzy
Customer Reviews	4.7 4.7 out of 5 stars (48,051)
Included Components	kids water bottle
Item Dimensions W x H	3.1"W x 6.9"H
Item Type Name	insulated-beverage-bottles
Item Weight	4 ounces
Manufacturer	THERMOS
Material Type	Stainless Steel
Model Name	FUNTAINER Water Bottle with Straw 12 Ounce
Number of Items	1
Pattern	Decorated
Product Care Instructions	Top Rack Dishwasher Safe
Recommended Uses For Product	Water
Theme	Animal
UPC	041205753605
Unit Count	1 Count

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€ 40.03

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered 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 Croatia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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