---
product_id: 658663185
title: "21 Oz Standard Mouth Flex Cap Moonshadow"
brand: "hydro flask"
price: "S$68"
currency: SGD
in_stock: true
reviews_count: 11
category: "Hydro Flask"
url: https://www.desertcart.sg/products/658663185-21-oz-standard-mouth-flex-cap-moonshadow
store_origin: SG
region: Singapore
---

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

**Brand:** hydro flask
**Price:** S$68
**Availability:** ✅ In Stock

## Summary

> 💧 Stay cool, stay hot, stay ahead with Hydro Flask Moonshadow!

## Quick Answers

- **What is this?** 21 Oz Standard Mouth Flex Cap Moonshadow by hydro flask
- **How much does it cost?** S$68 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/658663185-21-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

- • **Lifetime companion:** Backed by a lifetime warranty, this bottle is designed to keep up with your busiest days.
- • **No spills, no stress:** Flex Cap design ensures a leakproof experience, even when tossed in your bag.
- • **Pure taste, every sip:** Advanced insulation prevents flavor transfer, so your water tastes fresh and clean.
- • **All-day hydration, zero compromise:** Keeps drinks icy cold for 24 hours and steaming hot for 12 hours with TempShield™ insulation.
- • **Built for your on-the-go lifestyle:** Durable stainless steel construction fits perfectly in cupholders and backpacks.

## Overview

The Hydro Flask 21 Oz Standard Mouth Flex Cap in Moonshadow is a premium stainless steel insulated water bottle designed for professionals who demand durability and performance. Featuring TempShield™ double-wall vacuum insulation, it keeps beverages cold for 24 hours and hot for 12 hours. Its leakproof Flex Cap and cupholder-compatible design make it ideal for daily commutes, workouts, and outdoor adventures. With a sleek Moonshadow purple finish and lifetime warranty, it’s the ultimate hydration upgrade for the modern millennial on the move.

## 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: Dishwasher safe and no leaking! - These are the best water bottles. They do not leak even after tossing in the dishwasher after every use. They keep water so cold. I refrigerate several and always have one to grab and go..
Review: Great quality everyday bottle - I am very happy with my purchase, it was well packaged. The design is very nice and I love the color I chose. Definitely leak proof and there aren’t any dents. Easy to open and great functionality, I take it to work, gym or if I’m just heading out for the day. I also bought a small bottom boot which is silicone to protect it from getting bump at the bottom of the bottle and a standard flex straw cap to use more so when I’m going to the gym.

## 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 |
| Batteries required | No |
| Best Sellers Rank | #171,842 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #1,320 in Insulated Bottles |
| Brand | Hydro Flask |
| Cap Type | Flex Cap |
| Capacity | 1 Fluid Ounces |
| Color | Moonshadow Purple |
| Customer Reviews | 4.9 4.9 out of 5 stars (73) |
| Department | Unisex-Adult |
| Global Trade Identification Number | 00840394203737 |
| Import | Imported |
| Included Components | Bottle |
| Is Dishwasher Safe | No |
| Item Weight | 12 ounces |
| Item model number | S21SX504 |
| Manufacturer | Hydro Flask |
| Material | Stainless Steel |
| Model Name | Standard Mouth Flex Cap Bottle |
| Number of Items | 1 |
| Number of Packs | 1 |
| Pattern | Solid |
| Product Care Instructions | Hand Wash Only |
| Product Dimensions | 5.75"W x 9"H |
| Recommended Uses For Product | Water |
| Special Feature | Vacuum Insulated |
| UPC | 840394203737 |
| Warranty Description | LIFETIME |
| With Lid | Yes |

## Product Details

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

## Images

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Dishwasher safe and no leaking!
*by S***O on May 29, 2025*

These are the best water bottles. They do not leak even after tossing in the dishwasher after every use. They keep water so cold. I refrigerate several and always have one to grab and go..

### ⭐⭐⭐⭐⭐ Great quality everyday bottle
*by K***R on December 8, 2024*

I am very happy with my purchase, it was well packaged. The design is very nice and I love the color I chose. Definitely leak proof and there aren’t any dents. Easy to open and great functionality, I take it to work, gym or if I’m just heading out for the day. I also bought a small bottom boot which is silicone to protect it from getting bump at the bottom of the bottle and a standard flex straw cap to use more so when I’m going to the gym.

### ⭐⭐⭐⭐⭐ Love Love Love!
*by A***A on July 24, 2025*

I love this water bottle so much! I’ve used it for a year now, and it’s gone on many adventures with me, including an international vacation. It keeps my water cold all day. It can be washed in the dishwasher. It fits in my CR-V’s cup holder. And although I’ve accidentally dropped it many times and it has some dents in it, it still functions perfectly. I did end up ordering a different cap that has a straw in it because I prefer to drink water that way. But the mouth of the bottle is relatively skinny, so you shouldn’t have a problem with water sloshing out when trying to drink from it.

## 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

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**Shop now:** [https://www.desertcart.sg/products/658663185-21-oz-standard-mouth-flex-cap-moonshadow](https://www.desertcart.sg/products/658663185-21-oz-standard-mouth-flex-cap-moonshadow)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-04-27*