---
product_id: 71953242
title: "Standard Mouth Water Bottle, Flex Cap - 21 oz, Black"
brand: "hydro flask"
price: "3699557₫"
currency: VND
in_stock: true
reviews_count: 5
category: "Hydro Flask"
url: https://www.desertcart.vn/products/71953242-standard-mouth-water-bottle-flex-cap-21-oz-black
store_origin: VN
region: Vietnam
---

# Keeps hot 6 hrs Fits car cup holders Keeps cold 24 hrs Standard Mouth Water Bottle, Flex Cap - 21 oz, Black

**Brand:** hydro flask
**Price:** 3699557₫
**Availability:** ✅ In Stock

## Summary

> 💧 Stay cool, stay sleek, stay ahead with Hydro Flask.

## Quick Answers

- **What is this?** Standard Mouth Water Bottle, Flex Cap - 21 oz, Black by hydro flask
- **How much does it cost?** 3699557₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/71953242-standard-mouth-water-bottle-flex-cap-21-oz-black)

## Best For

- hydro flask enthusiasts

## Why This Product

- Trusted hydro flask brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sip & Go Standard Mouth:** 1.81" opening fits ice cubes and Hydro Flask caps, perfect for on-the-move sipping without spills.
- • **Durable & Slip-Free Grip:** Proprietary powder coat finish ensures a sweat-free, secure hold during your busiest days.
- • **Pure Taste, No Compromise:** 18/8 food-grade stainless steel keeps flavors fresh and free from BPA toxins.
- • **Eco-Chic & Lifetime Backed:** Sustainably made with recyclable materials and backed by a lifetime warranty—hydration that lasts a lifetime.
- • **Ice-Cold Hydration All Day:** Double-wall TempShield insulation locks in cold for 24 hours, so you never compromise on refreshment.

## Overview

The Hydro Flask Standard Mouth Water Bottle (21 oz) features double-wall vacuum TempShield insulation that keeps drinks cold up to 24 hours and hot up to 6 hours. Made from BPA-free 18/8 stainless steel with a slip-resistant powder coat, it fits most car cup holders and bike racks. Designed for active professionals, it offers durable, pure hydration on the go, backed by a lifetime warranty.

## Description

Count on ice in the forecast. Staying hydrated is easy when you’ve got this portable thirst-quenching travel buddy. Whether you’re headed to the gym or a quick jaunt across town, you can easily take your refreshment with you. The 18/8 stainless steel double wall vacuum insulation technology will keep cold liquids chilled for up to 24 hours, while hot liquids remain hot for up to 6. The Standard Mouth opening is large enough to fit most ice cubes, but small enough to sip from on the go. Double wall vacuum insulation keeps your ice cubes intact and your drink icy cold for up to 24 hours. It's large enough to hold water for the day, yet it fits easily into a pack, side pocket or car cup holder. 18/8 stainless steel keeps your favorite beverage fresh and pure, without any leftover flavors or odors. All Hydro Flasks use recyclable materials and are backed by the manufacturer's lifetime warranty. Features: Small enough for convenient transport Standard Mouth Opening TempShield Protected Double Wall Vacuum Insulated Keeps Hot up to 6 Hours, Keeps Cold up to 24 Hours Durable, sweat-free powder coat finish (except for the Stainless option) BPA-Free 18/8 Stainless Steel Lifetime Warranty Compatable Lids: Hydro Flask Sport Cap Parks for All - With Hydro Flask's new giving program, Parks for All, they are focusing on one overarching goal: supporting the development and maintenance of public green spaces everywhere Hand wash only with hot, soapy water. Rinse and dry, and it's ready for adventure

Review: Es cara pero la compré en promoción. Honestamente estaba cansada de tener botellas q no me mantenían el agua fría y estoy contenta con esta
Review: Really good well made bottle. Keeps drinks super cool for ages

## Features

- Standard Mouth 1.81" opening fits the Hydro Flask Sport Cap and Standard Mouth Flex Cap
- With its double-wall vacuum insulated TempShield technology, liquids remain hot up to 6 Hours, and cold up to 24 Hours
- All Hydro Flasks are made of non-toxic BPA-free plastics & 18/8 stainless steel food-grade stainless steel
- Thanks to the proprietary powder coat, your bottle stays slip-free making it easy to go wherever you do
- Fits in most automobile cup holders and bicycle bottle racks

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01KXHIWL8 |
| Age Range (Description) | Adult |
| Base Diameter | 7.1 Centimetres |
| Best Sellers Rank | #364,986 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #6,840 in Water Bottles |
| Brand | Hydro Flask |
| Cap Type | Screw Cap |
| Capacity | 21 Fluid Ounces |
| Colour | Black |
| Country of Origin | USA |
| Department | Girls |
| Generic Name | Water Bottle |
| Global Trade Identification Number | 00810497025680 |
| Importer | Creative Peripherals and Distribution Limited 3rd & 4th Floor, Plot No. 137AB, Kandivali Co Op Industrial Estate Limited, Charkop, Kandivali West, Mumbai – 400 067 |
| Included Components | Lid |
| Is Dishwasher Safe | Yes |
| Item Dimensions LxWxH | 7.2 x 7.2 x 28.2 Centimeters |
| Item Weight | 23.7 g |
| Item model number | SYNCHKG099288 |
| Manufacturer | Hydro Flask, Hydro Flask 525 NW York Dr Bend, OR Sportswear |
| Material | Stainless Steel |
| Model Name | S21SX001 |
| Net Quantity | 1 Count |
| Number of Items | 1 |
| Packer | Hydro Flask 525 NW York Dr Bend, OR Sportswear |
| Pattern | Solid |
| Product Care Instructions | Hand Wash Only |
| Product Dimensions | 7.24 x 7.24 x 28.19 cm; 23.68 g |
| Recommended Uses For Product | Water |
| Special Feature | portable |
| UPC | 810497025680 |
| With Lid | Yes |

## Product Details

- **Brand:** Hydro Flask
- **Capacity:** 21 Fluid Ounces
- **Colour:** Black
- **Recommended Uses For Product:** Water
- **Special Feature:** portable

## Images

![Standard Mouth Water Bottle, Flex Cap - 21 oz, Black - Image 1](https://m.media-amazon.com/images/I/61zTQE7uD5L.jpg)

## Questions & Answers

**Q: Re Hydro Flask 24", what does "flex lid" mean?**
A: no, you can't. if you watch the video it shows that you have to remove the lid to drink. i think the "flex" is in fact that the handle folds down, instead of being "fixed".  you can get a lid that has a pop-up straw.

**Q: Ok so does it come with little stickers?**
A: Hi - Wendy here from Tall Ridge, the exclusive authorized seller of Hydro Flask products on Amazon - Thank you for your inquiry! Our Hydro Flask products do not come with stickers. I hope that answers your question.

**Q: Curious... is the bottle supposed to be perfectly round all the way up and down?  i just received mine from amazon and it is not.  it feels oblong.**
A: Yes, it should be perfectly cylindrical (round) all the way up. If it's not, there is an issue, and I would think that the company would take care of it. To tell if it's in fact round, remove the cap, make sure it's empty, place it on its side on a flat surface, and roll it.

**Q: I just bought this hydroflask in the color olive. Is it normal for the lid to have to be forced to close all the way? It doesnt close easily**
A: How did this work out for you? I'm experiencing same problem? I know it's not normal as I have been using this brand for a couple years now. Did u keep and use?

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by M***. on 16 September 2025*

Es cara pero la compré en promoción. Honestamente estaba cansada de tener botellas q no me mantenían el agua fría y estoy contenta con esta

### ⭐⭐⭐⭐⭐ Review
*by M***N on 6 December 2025*

Really good well made bottle. Keeps drinks super cool for ages

### ⭐⭐⭐⭐⭐ Review
*by M***O on 24 August 2025*

⭐⭐⭐⭐⭐ Die Hydro Flask 621 ml ist für mich die perfekte Trinkflasche – egal ob im Alltag, beim Sport oder auf Reisen. Sie hält Getränke wirklich stundenlang kalt oder heiß, ohne dass die Temperatur nachlässt. Besonders im Sommer bleibt das Wasser eiskalt, selbst wenn die Flasche stundenlang in der Sonne liegt. Das Material wirkt extrem hochwertig und robust, trotzdem ist die Flasche angenehm leicht zu tragen. Durch die Pulverbeschichtung liegt sie sicher in der Hand und rutscht nicht. Auch nach längerem Gebrauch sieht sie noch fast wie neu aus – keine Kratzer oder Abnutzungen

## Frequently Bought Together

- Hydro Flask Standard Flex Cap Black 21 Oz
- Hydro Flask Flex Boot - Accessory Silicone Water Bottle Protector - Dishwasher Safe, BPA-Free, Non-Toxic Small
- Hydro Flask Standard Mouth Lids- Accessory for Standard Mouth Water Bottle

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**Shop now:** [https://www.desertcart.vn/products/71953242-standard-mouth-water-bottle-flex-cap-21-oz-black](https://www.desertcart.vn/products/71953242-standard-mouth-water-bottle-flex-cap-21-oz-black)

---

*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-05*