---
product_id: 549464501
title: "ThermoFlask 40 oz Double Wall Vacuum Insulated Stainless Steel 2-Pack of Water Bottles, Onyx Black/Splash"
brand: "thermoflask"
price: "$392"
currency: NZD
in_stock: true
reviews_count: 8
category: "Thermo Flask"
url: https://www.desertcart.nz/products/549464501-thermoflask-40-oz-double-wall-vacuum-insulated-stainless-steel-2
store_origin: NZ
region: New Zealand
---

# Leak-proof chug lid 12-hour hot retention 24-hour cold retention ThermoFlask 40 oz Double Wall Vacuum Insulated Stainless Steel 2-Pack of Water Bottles, Onyx Black/Splash

**Brand:** thermoflask
**Price:** $392
**Availability:** ✅ In Stock

## Summary

> 💼 Stay cool, stay hot, stay ahead—hydrate like a pro with ThermoFlask.

## Quick Answers

- **What is this?** ThermoFlask 40 oz Double Wall Vacuum Insulated Stainless Steel 2-Pack of Water Bottles, Onyx Black/Splash by thermoflask
- **How much does it cost?** $392 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/549464501-thermoflask-40-oz-double-wall-vacuum-insulated-stainless-steel-2)

## Best For

- thermoflask enthusiasts

## Why This Product

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

## Key Features

- • **Durable & Eco-Chic:** Premium stainless steel construction built to last, reducing single-use plastic waste while elevating your daily style.
- • **All-Day Temperature Lock:** Double-wall vacuum insulation keeps drinks icy cold for 24 hours or piping hot for 12 hours—no compromises.
- • **Perfect Fit for Your Hustle:** 40 oz capacity fits most cup holders and backpacks—ideal for work, workouts, or weekend adventures.
- • **Two-Pack Value & Versatility:** Get double the hydration power with two sleek bottles in Onyx Black and Splash—because one just isn’t enough.
- • **Effortless One-Handed Hydration:** Innovative leak-proof chug lid designed for spill-free, on-the-go sipping—stay refreshed without missing a beat.

## Overview

ThermoFlask 40 oz Double Wall Vacuum Insulated Stainless Steel 2-Pack offers superior temperature retention with 24-hour cold and 12-hour hot insulation. Featuring a leak-proof chug lid for easy one-handed use, these durable bottles are designed for active professionals seeking sustainable, stylish hydration on the go. Perfectly sized to fit most cup holders and backpacks, this two-pack in Onyx Black and Splash colors combines convenience, eco-friendliness, and premium quality for everyday adventures and busy lifestyles.

## Description

Keep your beverages cold all day without a cooler (or hot without a microwave) Our double-wall vacuum insulated stainless steel bottles prevent outside temperatures from affecting the inside beverage temperature so your drink stays just the way you like it – all day long. Great for everyday adventures or outdoor activities like hiking, camping, biking, sports, picnics, and more. Drink the way you want with easy, controlled one-handed drinking.

Review: Really useful bottles - Having just done a review of the wide mouth replacement lids (that you suck through rather than pour) felt it necessary to review the bottles themselves. Bought my first pair at Costco and they were so so useful tried to get two more but Costco don't do then now so tried and succeded with desertcart UK. More robust than plastic bottles and keep the water really cool. I use my for squash as plain water not to my liking but you do need to wash out bottle and lid frequently as the squash can leave residue which will tiant the taste, especially black currant and apple.
Review: Hits the spot - Bought this for my son to take to school, we have been using on trips outside home all summer. I took off the straw, and it works perfectly well and maintains the temperature for a good 5-6 hours. Easy to clean, easy to use and the lids are interchangeable. What’s not to like!

## Features

- Stay Hydrated All Day: 2-Pack ThermoFlask Stainless Bottles ensure your drinks remain at the ideal temperature with double-wall vacuum insulation. Perfect for all-day freshness.
- Leak-Proof Chug Lid: Enjoy hassle-free hydration with our water bottle's innovative Chug lid, designed for easy one-handed sipping without spills. Perfect for on-the-go refreshment.
- Adventure-Ready Hydration: ThermoFlask's insulated bottles are your daily companion, keeping hot drinks warm and cold beverages chilled. Ideal for the active lifestyle.
- Versatile Hydration Options: Choose from our premium 14-64 oz insulated bottles in various colors. Fits most cup holders and backpacks, ensuring hydration is always at hand.
- Sustainable Quality with ThermoFlask: Embrace eco-friendly hydration for outdoor activities or daily commuting. Our durable stainless steel bottles are built to last.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BBPNVNT2 |
| Batteries required | No |
| Best Sellers Rank | 415,704 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 4,562 in Cycling Bottles |
| Care instructions | Hand Wash Only |
| Customer Reviews | 4.8 4.8 out of 5 stars (16,912) |
| Date First Available | 6 Sept. 2022 |
| Dishwasher safe? | Yes |
| Included components | Two Bottles, Two Lids |
| Is assembly required | No |
| Item model number | 10158 |
| Item weight | 1227 Grams |
| Number of pieces | 2 |
| Product Dimensions | 21.84 x 21.84 x 30.23 cm; 1.23 kg |

## Product Details

- **Brand:** ThermoFlask
- **Capacity:** 40 Fluid Ounces
- **Colour:** Onyx Black/Splash
- **Recommended uses for product:** Hot
- **Special feature:** Leakproof

## Images

![ThermoFlask 40 oz Double Wall Vacuum Insulated Stainless Steel 2-Pack of Water Bottles, Onyx Black/Splash - Image 1](https://m.media-amazon.com/images/I/71VDcTo19RL.jpg)
![ThermoFlask 40 oz Double Wall Vacuum Insulated Stainless Steel 2-Pack of Water Bottles, Onyx Black/Splash - Image 2](https://m.media-amazon.com/images/I/71TUBSci+1L.jpg)
![ThermoFlask 40 oz Double Wall Vacuum Insulated Stainless Steel 2-Pack of Water Bottles, Onyx Black/Splash - Image 3](https://m.media-amazon.com/images/I/61uU1ddtrmL.jpg)
![ThermoFlask 40 oz Double Wall Vacuum Insulated Stainless Steel 2-Pack of Water Bottles, Onyx Black/Splash - Image 4](https://m.media-amazon.com/images/I/61rlc9jnmtL.jpg)
![ThermoFlask 40 oz Double Wall Vacuum Insulated Stainless Steel 2-Pack of Water Bottles, Onyx Black/Splash - Image 5](https://m.media-amazon.com/images/I/61DUpFG-vqL.jpg)

## Available Options

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

## Questions & Answers

**Q: These are 40 oz right?**
A: Yes both are 40 oz

**Q: What are the dimentions?**
A: The thermoflask can fill 710ml or 24oz of hot or cold water, it comes in 2 bottles in one box.  These are brand new.  Hope I answered your question.  Phoenix

**Q: How much does the 24oz bottle weigh?**
A: It's quite heavy.  It weighs about 10oz. empty.

**Q: Will it fit in a standard car cup holder? What is the width of the base of the bottle?**
A: Thank you for your interest.  These have a diameter of 3.15" with the bumper and 2.92" without the bumper.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Really useful bottles
*by S***K on 8 March 2022*

Having just done a review of the wide mouth replacement lids (that you suck through rather than pour) felt it necessary to review the bottles themselves. Bought my first pair at Costco and they were so so useful tried to get two more but Costco don't do then now so tried and succeded with Amazon UK. More robust than plastic bottles and keep the water really cool. I use my for squash as plain water not to my liking but you do need to wash out bottle and lid frequently as the squash can leave residue which will tiant the taste, especially black currant and apple.

### ⭐⭐⭐⭐⭐ Hits the spot
*by M***P on 13 September 2020*

Bought this for my son to take to school, we have been using on trips outside home all summer. I took off the straw, and it works perfectly well and maintains the temperature for a good 5-6 hours. Easy to clean, easy to use and the lids are interchangeable. What’s not to like!

### ⭐ Does not keep hot water hot
*by J***N on 17 June 2023*

Hot water goes cold in about 3 hrs

## Frequently Bought Together

- Thermoflask Double Wall Vacuum Insulated Stainless Steel Water Bottle (Onyx Black/Splash)
- Prurex Replacement Spout Lid for Hydro Flask Wide Mouth Bottles (12/16/18/22/32/40/64oz) – 2.28" Leak-Proof Sports Cap Accessory, Secure Fit

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**Shop now:** [https://www.desertcart.nz/products/549464501-thermoflask-40-oz-double-wall-vacuum-insulated-stainless-steel-2](https://www.desertcart.nz/products/549464501-thermoflask-40-oz-double-wall-vacuum-insulated-stainless-steel-2)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-02*