---
product_id: 628084891
title: "Hydro Flask 21 Oz Standard Flex Cap Fir"
brand: "hydro flask"
price: "¥30418"
currency: JPY
in_stock: false
reviews_count: 5
category: "Hydro Flask"
url: https://www.desertcart.jp/products/628084891-hydro-flask-21-oz-standard-flex-cap-fir
store_origin: JP
region: Japan
---

# Leakproof Flex Cap Keeps drinks hot 12h Keeps drinks cold 24h Hydro Flask 21 Oz Standard Flex Cap Fir

**Brand:** hydro flask
**Price:** ¥30418
**Availability:** ❌ Out of Stock

## Summary

> 💧 Stay cool or warm, always in style.

## Quick Answers

- **What is this?** Hydro Flask 21 Oz Standard Flex Cap Fir by hydro flask
- **How much does it cost?** ¥30418 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/628084891-hydro-flask-21-oz-standard-flex-cap-fir)

## 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

- • **Perfectly portable:** 21 oz capacity fits cupholders and backpacks for seamless daily carry.
- • **Sip without spills:** Flex Cap’s leakproof design means no mess, just pure convenience on the go.
- • **Durability meets style:** 18/8 pro-grade stainless steel with Color Last powder coat stays vibrant and sweat-free.
- • **Pure taste, no flavor transfer:** Premium stainless steel ensures every sip tastes exactly how it should.
- • **All-day hydration, zero compromise:** TempShield double-wall vacuum insulation locks in temps—cold for 24 hours, hot for 12.

## Overview

The Hydro Flask 21 Oz Standard Flex Cap Fir is a premium insulated water bottle crafted from durable 18/8 stainless steel. Featuring TempShield double-wall vacuum insulation, it keeps beverages cold for up to 24 hours and hot for up to 12 hours. Its leakproof Flex Cap and sweat-free Color Last powder coat make it the ideal companion for professionals on the move seeking reliable hydration with a splash of vibrant style.

## Description

Stainless steel, cupholder compatible, fits right in your pack—our reusable, refillable 21 oz Standard Mouth insulated water bottle keeps cold drinks cold for 24 hours, hot drinks hot for up to 12 hours, and holds enough hydration for hours of fun.

Review: Hot water doesnt stay hot for more than 5-6 hours
Review: Me encanta la marca y el color, los hielos si duran mucho tiempo, creo que el tamaño es súper práctico, no recomiendo meter bebidas con gas ya que cuando se abre “explota”

## Features

- TempShield️ double-wall vacuum insulation keeps drinks cold up to 24 hours, hot up to 12
- Flex Cap is leakproof when closed
- Honeycomb️ Insulated Cap for maximum temperature retention
- Made with 18/8 pro-grade stainless steel for durability, pure taste and no flavor transfer
- Color Last powder coat is durable, sweat-free and colorful

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CJCRKWNT |
| Age Range (Description) | Adult |
| Base Diameter | 7.3 Centimetres |
| Brand | Hydro Flask |
| Cap Type | Flex Cap |
| Capacity | 1 Fluid Ounces |
| Colour | FIR |
| Country of Origin | China |
| Department | unisex-adult |
| Generic Name | Water Bottle |
| Global Trade Identification Number | 00810096852403, 10810096852400 |
| Included Components | Bottle |
| Is Dishwasher Safe | Yes |
| Item Weight | 300 g |
| Item model number | S21SX332 |
| Manufacturer | Hydro Flask |
| Material | Stainless Steel |
| Model Name | Standard Mouth Flex Bottle |
| Net Quantity | 1.0 Count |
| Number of Items | 1 |
| Number of Packs | 1 |
| Pattern | Solid |
| Product Care Instructions | Hand Wash Only |
| Product Dimensions | 14.6W x 22.9H Centimeters |
| Recommended Uses For Product | Coffee, Soup, Tea, Water |
| Special Feature | Leakproof, durable |
| UPC | 810096852403 |
| With Lid | Yes |

## Product Details

- **Brand:** Hydro Flask
- **Capacity:** 1 Fluid Ounces
- **Colour:** FIR
- **Recommended Uses For Product:** Coffee, Soup, Tea, Water
- **Special Feature:** Leakproof, durable

## Images

![Hydro Flask 21 Oz Standard Flex Cap Fir - Image 1](https://m.media-amazon.com/images/I/212Xh9vwHeL.jpg)
![Hydro Flask 21 Oz Standard Flex Cap Fir - Image 2](https://m.media-amazon.com/images/I/21uhv79t0EL.jpg)
![Hydro Flask 21 Oz Standard Flex Cap Fir - Image 3](https://m.media-amazon.com/images/I/31nsxywXS9L.jpg)
![Hydro Flask 21 Oz Standard Flex Cap Fir - Image 4](https://m.media-amazon.com/images/I/41YV3WSYJ+L.jpg)
![Hydro Flask 21 Oz Standard Flex Cap Fir - Image 5](https://m.media-amazon.com/images/I/51DdoZlyonL.jpg)

## Customer Reviews

### ⭐⭐⭐ Review
*by K***N on 9 March 2025*

Hot water doesnt stay hot for more than 5-6 hours

### ⭐⭐⭐⭐⭐ Review
*by E***T on 21 July 2024*

Me encanta la marca y el color, los hielos si duran mucho tiempo, creo que el tamaño es súper práctico, no recomiendo meter bebidas con gas ya que cuando se abre “explota”

### ⭐⭐⭐⭐⭐ Review
*by H***A on 5 December 2025*

As described

## Frequently Bought Together

- Hydro Flask Standard Flex Cap Fir 21 Oz
- Hydro Flask - Flex Straw Cap for Standard Mouth - Leakproof - Honeycomb Insulated Cap with Flex Strap for Easy Carrying - BPA-Free and Toxin-Free - Dishwasher Safe - Black

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**Shop now:** [https://www.desertcart.jp/products/628084891-hydro-flask-21-oz-standard-flex-cap-fir](https://www.desertcart.jp/products/628084891-hydro-flask-21-oz-standard-flex-cap-fir)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-05*