Am I able to buy any of the bottles that already have the flex straw lid on them or do I have to buy that lid separately?

You are able to buy bottles that already come with a flex Straw cap, but for the availability of those units, you need to check with a dealer directly. Your Hydro Flask team.

Why does it state flex cap as being ‘girls’?

No idea. This came with a twist cap and it is fine. I use sports bottles with different caps for when in the gym etc. The hydroflask is a really solid design.

What diameter is the base

Hello, The diameter of both the 18 Ounce and 21 ounce Standard mouth bottle is 2.87 Inches or 7.29 centimetres.

Hi how do I know if it is legitimate?

it is legit, it's a great flask

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Hydro Flask - Water Bottle 621 ml (21 oz) - Vacuum Insulated Stainless Steel Water Bottle with Leak Proof Flex Cap and Powder Coat - Standard Mouth - White

Product ID: 54301030

Details

Brand
Hydro Flask
Capacity
21 Fluid
Colour
White
Recommended uses for product
Coffee Soup
Special feature
Straw safe

🔒Leak-proof flex cap

🔥Keeps drinks hot 12h

❄️Keeps drinks cold 24h

¥11526

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

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Description

💧 Stay cool, stay hot, stay unstoppable with Hydro Flask.

BUILT TO ENDURE YOUR HUSTLE - Rugged stainless steel construction resists dents and keeps your drink tasting pure, no matter how intense your day gets.
LIFETIME WARRANTY FOR PEACE OF MIND - Hydro Flask stands behind its quality with a lifetime warranty, so you can invest in hydration that lasts.
EFFORTLESS CLEANING WITH POWDER COAT - Durable powder coating resists scratches and makes hand washing a breeze—because your time is valuable.
LEAK PROOF FLEX CAP WITH CARRY STRAP - Secure, spill-proof lid with an easy-carry strap means hydration on-the-go without the mess or hassle.
TEMP SHIELD TECH FOR ALL DAY FRESHNESS - Double-wall vacuum insulation locks in cold for 24 hours and heat for 12 hours—stay refreshed from morning meetings to evening workouts.

The Hydro Flask 621 ml water bottle features double-wall vacuum insulation with TempShield technology to keep beverages cold for 24 hours or hot for 12 hours. Crafted from durable stainless steel with a powder-coated finish, it offers a leak-proof flex cap with a convenient carrying strap. Designed for active professionals, it combines rugged durability with sleek style and comes backed by a lifetime warranty.

Specifications

ASIN	B01KXHGYQ8
Age Range Description	Adult
Age range (description)	Adult
Base Diameter	7.3 Centimetres
Best Sellers Rank	64,212 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 2,259 in Canteens & Water Bottles
Brand	Hydro Flask
Brand Name	Hydro Flask
Cap Type	Flex Cap
Capacity	21 Fluid ounces
Colour	White
Country Of Origin	China
Customer Reviews	4.6 out of 5 stars 1,927 Reviews
Global Trade Identification Number	00810497025697
Included Components	bottle, lid
Is the item dishwasher safe?	No
Item Dimensions W x H	29W x 111H millimetres
Item Type Name	Insulated Bottle
Item Weight	24 g
Manufacturer	Hydro Flask
Manufacturer Warranty Description	Hydro flask lifetime warranty.
Material Type	Stainless Steel
Model Name	Standard Mouth Flex Cap
Number of Items	1
Pattern	Single
Product Care Instructions	Hand Wash Only
Recommended Uses For Product	Coffee, Soup, Tea, Water
Recommended uses for product	Coffee, Soup, Tea, Water
Special Features	Cold 24 Hours
Special feature	Cold 24 Hours
Theme	Car
UPC	810497025697
Unit Count	1.0 count
With Lid	Yes

Reviews

S**R

Durable and stylish. Keeps drinks cool

Good bottle, keeps drinks cool. Durable and easy to wash. Can be a little difficult to open but my daughter loves it

11.07.2026

K**Y

LOVE IT

It does a perfect job at maintaining the water temperature! What I also like about it is that it has a handle to carry the bottle around too! Finally I really like the amount it holds because as someone who uses for school, I think that is the perfect amount of water I want to take to school.

29.03.2023

E**A

Great bottle

I love this water bottle! Don’t regret buying. However it’s very easy to break and very delicate so if you want it to last longer I suggest you keep it at home as a home waterbottle

30.09.2023

A**S

Perfect

I already have a 40oz one and so I got a smaller one with a narrow mouth, I really prefer the smaller mouth on it. Like it states perfect for sipping. Easy to clean, especially with the cleaning products. Also keeps my drinks cool for a very long time, love it.

10.07.2021

A**R

String and sturdy , keeps water very cold.

Good flask although very expensive for what it is.

7.01.2020

L**A

WOW!!!

Bought on recommendation from a friend it is legit keeps cold things cold for ages!!! Hot things hot for slightly less haha but still insane.

3.11.2018

A**R

Good bottle

My daughter loves this bottle. It’s good quality, it keeps the water cool for long periods.

31.12.2019

B**A

Vsco essential

My daighter loves this!! Looks fab and stays cold

4.01.2020

C**E

Best Drinking Bottle

I needed to get me one that will fit my daily bag to work. I found this size and til now I am very satisfied. It keeps your drink cool for hours! When I put ice in it in the morning, it will stay there til night. I am a hydroflask user ever since, i left mine back home so I decided to buy one here. Recommended for drinking bottle

12.09.2023

M**M

SO CUTE

GOT THIS FOR MY SIS FOR SCHOOL AND SHE LOVES IT SO MUCH!!!!

26.08.2023

O**T

Great for the winter

I tested it out on Iceland, worked like a charm, I always drank room temperature water while hiking at -20C. Going back to Montreal, I leave it at my car the whole day -10/-30C, then take it out for gym workout at night, always keep the temperature, this thing is incredible, worth the money

4.02.2026

C**T

Good

The product is good, however, there’s a small dent on it when it was delivered.

9.12.2025

M**H

It is rusted!

After a month of use it is rusted from the inside! I have only used it for water. I thought i am buying a good quality brand! Very disappointed!!!

27.01.2023

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¥11526

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

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