---
product_id: 716975326
title: "Hydro Flask 21 Oz Standard Mouth Flex Cap Moonshadow"
brand: "hydro flask"
price: "€ 259.44"
currency: EUR
in_stock: false
reviews_count: 5
category: "Hydro Flask"
url: https://www.desertcart.fi/products/716975326-hydro-flask-21-oz-standard-mouth-flex-cap-moonshadow
store_origin: FI
region: Finland
---

# Leakproof seal 12h hot retention 24h cold retention Hydro Flask 21 Oz Standard Mouth Flex Cap Moonshadow

**Brand:** hydro flask
**Price:** € 259.44
**Availability:** ❌ Out of Stock

## Summary

> 💧Hydrate like a pro—because your drink deserves the best.

## Quick Answers

- **What is this?** Hydro Flask 21 Oz Standard Mouth Flex Cap Moonshadow by hydro flask
- **How much does it cost?** € 259.44 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/716975326-hydro-flask-21-oz-standard-mouth-flex-cap-moonshadow)

## 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

- • **Leakproof Confidence:** Flex Cap ensures a secure, spill-proof seal so you can toss it in your bag worry-free.
- • **Zero Flavor Transfer:** Enjoy pure, untainted taste every sip—no metallic or plastic aftertaste.
- • **Effortless Carry & Fit:** Cupholder compatible and lightweight with a semi-flexible handle for on-the-go hydration.
- • **Adventure-Ready Durability:** Crafted from tough stainless steel that withstands your busiest days and wildest hikes.
- • **Stay Chill or Sizzle All Day:** Keeps beverages cold for 24 hours and hot for 12 hours with TempShield️ double-wall vacuum insulation.

## Overview

The Hydro Flask 21 Oz Standard Mouth Flex Cap in Moonshadow is a premium stainless steel water bottle designed for professionals and adventurers alike. Featuring TempShield️ double-wall vacuum insulation, it keeps drinks cold for 24 hours and hot for 12 hours. Its leakproof Flex Cap and durable build make it perfect for daily commutes, workouts, or outdoor excursions, while the pure taste technology ensures no flavor transfer. Compact and cupholder compatible, it fits seamlessly into your active lifestyle.

## Description

Stainless steel, cupholder compatible, fits right in your pack—the 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: völlig super, halt auch bei über 30 Grad Außentemperatur mehr als den ganzen Tag die Flüssigkeit kalt und heiß bzw. warm bleiben Getränke tatsächlich tagelang... das rechtfertigt den Preis dann doch irgendwie
Review: It holds water and is a pretty color. Semi-flexible handle makes for easy carrying.

## Features

- 24 hours cold, 12 hours hot
- TempShield️ double-wall vacuum insulation
- Leakproof when closed
- Pure taste, no flavor transfer
- Durable stainless steel

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D3VKX2JP |
| Age Range (Description) | Adult |
| Best Sellers Rank | #1,639,915 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #7,167 in Insulated Bottles |
| Brand | Hydro Flask |
| Cap Type | Flex Cap |
| Capacity | 1 Fluid Ounces |
| Colour | Moonshadow |
| Country of Origin | USA |
| Department | Unisex-Adult |
| Generic Name | Water Bottle |
| Global Trade Identification Number | 00840394203737 |
| Included Components | Bottle |
| Is Dishwasher Safe | No |
| Item Weight | 340 g |
| Item model number | S21SX504 |
| Manufacturer | Hydro Flask |
| Material | Stainless Steel |
| Model Name | Standard Mouth Flex Cap Bottle |
| Net Quantity | 1.0 Count |
| Number of Items | 1 |
| Pattern | Solid |
| Product Care Instructions | Hand Wash Only |
| Product Dimensions | 14.6W x 22.9H Centimeters |
| Recommended Uses For Product | Water |
| Special Feature | Vacuum Insulated |
| UPC | 840394203737 |
| With Lid | Yes |

## Product Details

- **Brand:** Hydro Flask
- **Capacity:** 1 Fluid Ounces
- **Colour:** Moonshadow
- **Recommended Uses For Product:** Water
- **Special Feature:** Vacuum Insulated

## Images

![Hydro Flask 21 Oz Standard Mouth Flex Cap Moonshadow - Image 1](https://m.media-amazon.com/images/I/61eFEyzPSHL.jpg)

## Available Options

This product comes in different **Color, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***. on 3 September 2025*

völlig super, halt auch bei über 30 Grad Außentemperatur mehr als den ganzen Tag die Flüssigkeit kalt und heiß bzw. warm bleiben Getränke tatsächlich tagelang... das rechtfertigt den Preis dann doch irgendwie

### ⭐⭐⭐⭐⭐ Review
*by D***N on 1 July 2025*

It holds water and is a pretty color. Semi-flexible handle makes for easy carrying.

### ⭐⭐⭐⭐⭐ Review
*by Y***R on 10 January 2026*

Like all My other hydroflask products- works well, as detailed, and certainly recommended . Note this is not a large capacity bottle- I use it in day pack but have a larger version in car .

## Frequently Bought Together

- Hydro Flask - Water Bottle 621 ml (21 oz) - Vacuum Insulated Stainless Steel Water Bottle with Straw Cap - BPA-Free - Standard Mouth - Moonshadow, Fossil
- 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.fi/products/716975326-hydro-flask-21-oz-standard-mouth-flex-cap-moonshadow](https://www.desertcart.fi/products/716975326-hydro-flask-21-oz-standard-mouth-flex-cap-moonshadow)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-24*