---
product_id: 757559012
title: "Standard Flex Straw Cap 621 ml (21 oz) Bottle"
brand: "hydro flask"
price: "$89.68"
currency: USD
in_stock: true
reviews_count: 13
category: "Hydro Flask"
url: https://www.desertcart.us/products/757559012-standard-flex-straw-cap-621-ml-21-oz-bottle
store_origin: US
region: United States of America
---

# Leak-proof Flex Straw Lid Keeps drinks hot 12h Keeps drinks cold 24h Standard Flex Straw Cap 621 ml (21 oz) Bottle

**Brand:** hydro flask
**Price:** $89.68
**Availability:** ✅ In Stock

## Summary

> 💦 Hydrate like a pro, wherever life takes you!

## Quick Answers

- **What is this?** Standard Flex Straw Cap 621 ml (21 oz) Bottle by hydro flask
- **How much does it cost?** $89.68 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/757559012-standard-flex-straw-cap-621-ml-21-oz-bottle)

## 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

- • **Built to Brave Life:** Durable 18/8 stainless steel construction resists dents and keeps flavors pure.
- • **Hydro Flask Promise:** Backed by a lifetime warranty, because quality hydration is forever.
- • **Sip Smart, Hands-Free:** Leak-proof Flex Straw Lid lets you hydrate effortlessly on the move—no spills, no fuss.
- • **Stay Chill or Stay Warm:** TempShield double-wall vacuum insulation locks in your ideal temperature all day long.
- • **Effortless Clean, Every Time:** Powder-coated finish is dishwasher safe, maintaining grip and vibrant color wash after wash.

## Overview

The Hydro Flask Standard Flex Straw Bottle features TempShield double-wall vacuum insulation that keeps beverages cold for up to 24 hours and hot for up to 12 hours. Its leak-proof flexible straw lid enables easy one-handed drinking, while the durable 18/8 stainless steel body ensures long-lasting use without flavor retention. Finished with a dishwasher-safe powder coating, this 621 ml bottle combines convenience, style, and reliability, all backed by a lifetime warranty.

## Description

Hydro Flask – Standard Flex Straw Cap 621 ml (21 oz) Bottle | Stainless Steel, Leakproof, Cupholder Compatible – Insulated Cold 24 Hrs – Beachplum: Hydro Flask – Standard Flex Straw Cap 621 ml (21 oz) Bottle | Stainless Steel, Leakproof, Cupholder Compatible – Insulated Cold 24 Hrs – Beachplum: desertcart.co.uk: Home & Kitchen

Review: Keeps liquids cold/hot for more than 8 hours - Since I have had my pink Hydro flask, I have been amazed at how well it has kept liquids cold. I left a full flask of ice cold water in it over 36 hours and was shocked that it was still ice cold when I actually sucked it up the straw. This was an amazing find now although I’ve never tried it with hot liquids I have no doubt that this would keep any liquid. I have hot all day no trouble at all. The seal must be absolutely superb for it to have kept my drink cold for so long when it comes to functionality I find it suits my needs as my hands are not very strong. I like the fact it has a strap handle so I can hook it out to bring it to me. I like the fact that I do not have to push very hard on the hinge of the straw for it to come up and although at the beginning I couldn’t unscrew the cap that was not because it wasn’t easy to undo, but because my hands are not strong enough. With such a wonderful choice of colours I chose pink because it matched my cupholder which it fits very very well. Although some people might think the price is quite high, I think considering this has kept everything colder than I ever expected longer than I ever expected. It is definitely worth every penny I spent and I’m considering buying a second one. If I could give it 10 stars I would that’s how good this is-if you haven’t bought one yet I can definitely recommend you do.
Review: Great bottle - Light weight no leaks and keeps drinks cool for hours

## Features

- IDEAL DRINKING TEMPERATURE: Our double-wall vacuum-insulated bottle keeps beverages cold for up to 24 hours and hot for up to 12 hours; The TempShield technology prevents condensation and heat transfer to the outside;
- BETTER DRINKING ON THE GO: With double-wall, vacuum-insulated technology, our water bottle maintains the IDEAL temperature; The leak-proof Flex Straw Lid allows for easy drinking with just one hand
- DURABLE WATER BOTTLE: Our eco-friendly, sturdy stainless steel bottle is perfect for any type of sport; The durable construction withstands everything life throws at it, while keeping the taste of your drink intact
- DISHWASHER SAFE: Our water bottles come with a powder coating that makes cleaning a breeze; Enjoy more leisure time and less work with this convenient feature
- SATISFACTION GUARANTEED: We offer a lif etime warranty against manufacturer defects; HYDRO FLASK stands behind our durable and robust materials and is committed to high standards

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0FL94YZF6 |
| Age Range Description | Adult |
| Age range (description) | Adult |
| Best Sellers Rank | 11,026 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 530 in Canteens & Water Bottles |
| Brand | Hydro Flask |
| Brand Name | Hydro Flask |
| Capacity | 621 ml |
| Colour | Beachplum |
| Country Of Origin | China |
| Customer Reviews | 4.7 out of 5 stars 2,639 Reviews |
| Included Components | 1 drinking vessel / accessory |
| Item Dimensions W x H | 8W x 27H centimetres |
| Item Type Name | Standard Flex Straw Bottle |
| Item Weight | 0.43 Kilograms |
| Manufacturer | Hydro Flask |
| Material Type | Stainless Steel |
| Model Name | Standard Flex Straw Bottle |
| Number of Items | 1 |
| Recommended Uses For Product | Water |
| Recommended uses for product | Water |
| Special Features | Tempshield Technology, Leak-Proof Flexible Straw Lid, Durable |
| Special feature | Tempshield Technology, Leak-Proof Flexible Straw Lid, Durable |
| Theme | Seascape |
| UPC | 840394214269 |
| Unit Count | 1.0 count |
| With Lid | Yes |

## Product Details

- **Brand:** Hydro Flask
- **Capacity:** 621 ml
- **Colour:** Beachplum
- **Recommended uses for product:** Water
- **Special feature:** Tempshield Technology, Leak-Proof Flexible Straw Lid, Durable

## Images

![Standard Flex Straw Cap 621 ml (21 oz) Bottle - Image 1](https://m.media-amazon.com/images/I/51UVX2XEyVL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Keeps liquids cold/hot for more than 8 hours
*by S***O on 4 August 2025*

Since I have had my pink Hydro flask, I have been amazed at how well it has kept liquids cold. I left a full flask of ice cold water in it over 36 hours and was shocked that it was still ice cold when I actually sucked it up the straw. This was an amazing find now although I’ve never tried it with hot liquids I have no doubt that this would keep any liquid. I have hot all day no trouble at all. The seal must be absolutely superb for it to have kept my drink cold for so long when it comes to functionality I find it suits my needs as my hands are not very strong. I like the fact it has a strap handle so I can hook it out to bring it to me. I like the fact that I do not have to push very hard on the hinge of the straw for it to come up and although at the beginning I couldn’t unscrew the cap that was not because it wasn’t easy to undo, but because my hands are not strong enough. With such a wonderful choice of colours I chose pink because it matched my cupholder which it fits very very well. Although some people might think the price is quite high, I think considering this has kept everything colder than I ever expected longer than I ever expected. It is definitely worth every penny I spent and I’m considering buying a second one. If I could give it 10 stars I would that’s how good this is-if you haven’t bought one yet I can definitely recommend you do.

### ⭐⭐⭐⭐⭐ Great bottle
*by B***W on 10 September 2026*

Light weight no leaks and keeps drinks cool for hours

### ⭐⭐⭐⭐⭐ Great product, built to last
*by S***L on 8 July 2026*

Really well built and should last years, looks great also, keeps things really cold especially in this heat

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-10-03*