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!

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).

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

Can i use it for milk

Yes, this could be used for milk, or any other cod beverage.

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THERMOS FUNTAINER Water Bottle with Straw, 12oz, Frozen 2 | Kids Stainless Steel Insulated Water Bottle, Keeps Drinks Cold Longer for School & Play, BPA-Free

Product ID: 302648842

Details

Brand
THERMOS
Capacity
12 ounces
Color
Frozen 2
Recommended Uses For Product
Water
Special Feature
Cold 12 Hours

🚰removable, hygienic straw

❄️12 hrs cold retention

🛡️18/8 stainless steel durability

23613CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

❄️ Keep it cool, keep it fun—hydrate like a hero with Frozen 2 flair!

STAY CHILL ALL DAY - Vacuum insulation keeps drinks icy cold for up to 12 hours—no more lukewarm sips during busy school days.
CLEAN SAFE ALWAYS - Removable, covered silicone straw and dishwasher-safe design ensure hygienic use and easy maintenance.
EFFORTLESS HYDRATION - Push-button flip-top lid with integrated soft-touch handle makes drinking and carrying a breeze for little hands.
ICONIC TRUST SINCE 1904 - Backed by Thermos’ 120-year heritage, this bottle combines timeless reliability with fun Frozen 2 style.
BUILT FOR ROUGH TUMBLE - Premium 18/8 stainless steel construction resists drops and dings, perfect for active kids on the go.

The THERMOS FUNTAINER 12oz Frozen 2 water bottle features double-wall vacuum insulation to keep drinks cold for 12 hours, durable 18/8 stainless steel construction, and a kid-friendly push-button lid with a removable, hygienic straw. Lightweight and compact with a soft-touch carry handle, it fits standard cup holders and backpacks, making it the perfect hydration companion for active kids. BPA-free and dishwasher safe, it combines trusted Thermos quality with playful Frozen 2 design.

Specifications

ASIN	B08Z7467XC
Additional Features	Cold 12 Hours, Double Wall, Removable Straw
Age Range Description	Kid
Base Diameter	2.7 inches
Best Sellers Rank	#36 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #5 in Insulated Bottles
Brand Name	THERMOS
Cap Type	Flip Top Cap
Capacity	12 ounces
Color	Frozen 2
Customer Reviews	4.7 4.7 out of 5 stars (37,751)
Global Trade Identification Number	00041205750123
Included Components	kids water bottle
Item Dimensions W x H	2.7"W x 6.9"H
Item Type Name	insulated-beverage-bottles
Item Weight	8 ounces
Manufacturer	Thermos
Manufacturer Warranty Description	limited 5 year manufacturer
Material Type	Stainless Steel
Model Name	FUNTAINER 12 Ounce Bottle
Number of Items	1
Pattern	Licensed Characters
Product Care Instructions	Top Rack Dishwasher Safe
Recommended Uses For Product	Water
Theme	Movie
UPC	041205750123
Unit Count	1 Count

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