---
product_id: 51711985
title: "Beast Tumbler - 900 ml (30 oz), Silver | Reusable Stainless Steel, Vacuum Insulated Cup | with + 2 Straws & Cleaning Brush | Double Wall Travel Flask Perfect for Hot or Iced Coffee | BPA Free"
brand: "greens steel"
price: "2973779₫"
currency: VND
in_stock: true
reviews_count: 10
category: "Greens Steel"
url: https://www.desertcart.vn/products/51711985-beast-tumbler-900-ml-30-oz-silver-reusable-stainless-steel
store_origin: VN
region: Vietnam
---

# 4+ hrs hot drink insulation 900ml capacity - perfect hydration 24+ hrs cold retention Beast Tumbler - 900 ml (30 oz), Silver | Reusable Stainless Steel, Vacuum Insulated Cup | with + 2 Straws & Cleaning Brush | Double Wall Travel Flask Perfect for Hot or Iced Coffee | BPA Free

**Brand:** greens steel
**Price:** 2973779₫
**Availability:** ✅ In Stock

## Summary

> 🥇 The Beast Tumbler: Hydrate like a pro, wherever life takes you!

## Quick Answers

- **What is this?** Beast Tumbler - 900 ml (30 oz), Silver | Reusable Stainless Steel, Vacuum Insulated Cup | with + 2 Straws & Cleaning Brush | Double Wall Travel Flask Perfect for Hot or Iced Coffee | BPA Free by greens steel
- **How much does it cost?** 2973779₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/51711985-beast-tumbler-900-ml-30-oz-silver-reusable-stainless-steel)

## Best For

- greens steel enthusiasts

## Why This Product

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

## Key Features

- • **Eco-Chic Bundle Included:** Comes with 2 reusable steel straws, a cleaning brush, and splash-proof lid—stylish sustainability made easy.
- • **Unrivaled 900ml Capacity:** Stay fueled all day with a perfectly sized 30 oz flask that fits your busy lifestyle.
- • **Dishwasher Safe & Leak-Proof:** Spend less time cleaning and zero worries about spills—built for your on-the-go hustle.
- • **Premium 18/8 Stainless Steel:** Rust-proof, BPA-free, and odorless for a pure taste experience every time.
- • **Next-Level Temperature Control:** Keeps your drinks icy cold for over 24 hours or piping hot for 4+ hours—no compromises.

## Overview

The Beast Tumbler is a 900ml (30 oz) vacuum-insulated stainless steel flask crafted from premium 18/8 food-grade steel. Designed for professionals on the move, it keeps beverages cold for over 24 hours and hot for 4+ hours. This BPA-free, rust-resistant tumbler includes two reusable steel straws, a cleaning brush, and a splash-proof lid, all dishwasher safe and leak-proof—perfect for sustainable, stylish hydration at work, travel, or play.

## Description

Enjoy hot or cold drinks in this 900ml stainless steel tumbler with vacuum insulation, leak-proof lid, and included accessories like straws and cleaning brush.

Review: SEARCH NO FURTHER - I bought 2 of these, a 20 oz for my daughter to take to Uni and a 30 oz for myself (currently OOS). I don't often leave reviews, as a lot things these days are mediocre at best and crap at worst. Not these 'beasts'!!! They are amazing! The seal fits really well and is easy to put back on if you remove it for cleaning, as I do. It keeps cold drinks cold for over 24 hours and hot drinks...I had a hot chocolate in mine and forgot it had been made. 4 hours later it was still piping hot, to the point I left the lid open for it to cool down!! The eco friendly straws and cleaning brush are a bonus, you don't often get them included with flasks/mugs (my partner calls then cups, I say he's wrong and they're flasks, but hey, potato potaato 🤷‍♀️ I have bought numerous other brands, both from desertcart and other places, in a long search for the perfect flask. And now I have found it. The old saying "buy it cheap, but it twice" is definitely true, as is "you get what you pay for". I actually don't mind paying more, for a product that genuinely does what it claims to do. And this product does. I have a kitchen cupboard full of plastic ones, metal ones, some leak, some are impossible to get clean, some can't go in the dishwasher, some are going rusty....I'm sure you get the picture. These Beast tumblers are worth every penny. I've spent less on others, which ultimately leak and I've spent more on one "dishwasher safe" one that is going rusty around the top now. If you are looking for a high quality flask, that can keep your drinks both piping hot and freezing cold (I'm intrigued about the icecream idea from another review 🤔) THEN THIS IS THE PRODUCT YOU NEED. What's more, there are so many different colours, with colour co-ordinated lids, the whole family can have their own with no confusion over whose is whose. Can't recommend these highly enough 👌
Review: Excellent 👌🏻 - This Beast tumbler is amazing. Keeps my water ice cold. 900ml is a perfect size as well, not too big and not too small. Tested it for leaks by turning it upside down and shaking it. 100% leak proof. I haven't used it for a hot drink yet? Not sure I will as I mainly use it for my filtered water. Haven't used the the straws or straw cleaner either yet. Nice little extra to have nonetheless. Get one you won't be disappointed!

## Features

- NEW EXCLUSIVE VALUE BUNDLE: Our drinking thermos mugs offers you unrivalled value for money. Included in your purchase you'll receive: 2 unbreakable steel straws (1 curved + 1 straight), a free straw brush & 1 splash proof lid, all presented in a beautiful gift box. Choose a colour & size to suit you!
- BECAUSE QUALITY MATTERS: While other steel cups use a cheaper 201 steel finish; we've cut no corners to ensure you get the best. The BEAST is crafted from the finest 18/8 top food grade 304 rust-proof stainless steel. Perfect for hot or iced coffee, tea, cold water, juice, wine, beer, milkshake, or a smoothie.
- CLEAN WITH EASE & SAVE TIME: Unlike other steel tumblers, your BEAST mug is 100% dishwasher safe! (Because you have better things to do then scrubbing out old coffee or dried in smoothies!). Perfect for your travel, holiday, festival, golf, or hike, ideal for adults & kids!
- FOR THE PLANET: There is no excuse to buy plastic again. These modern reusable drinks cups are an environmentally friendly solution that protects you without harmful materials! Our products are made of 18/8 food-grade stainless steel & are BPA-free. Your cool drink will be kept fresh, without a metal taste, & odour-free.
- TOP QUALITY & 100% SATISFACTION - Enough of the cheap plastic & second rated tumblers on offer. We know you deserve the best and that's why our products and service is second to none. Every Greens Steel Product is backed by our commitment to your complete satisfaction. Order now and put us to the test! Don't settle for any less.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01AZB6TQW |
| Auto Shutoff | No |
| Best Sellers Rank | 6,045 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 25 in Insulated Tumblers |
| Brand | Greens Steel |
| Colour | Stainless |
| Customer Reviews | 4.5 4.5 out of 5 stars (77,066) |
| Date First Available | 23 Jan. 2016 |
| Diameter | 4.7 Inches |
| Item Weight | 449 g |
| Model Number | 1 |
| Special Features | Transparent, Double-Wall, Scratch-Resistant, Color_Changing, Slid_Cover, Rust Resistant |

## Product Details

- **Brand:** Greens Steel
- **Capacity:** 30 Fluid Ounces
- **Colour:** Stainless
- **Material:** Stainless Steel
- **Special feature:** Transparent, Double-Wall, Scratch-Resistant, Color_Changing, Slid_Cover, Rust Resistant

## Images

![Beast Tumbler - 900 ml (30 oz), Silver | Reusable Stainless Steel, Vacuum Insulated Cup | with + 2 Straws & Cleaning Brush | Double Wall Travel Flask Perfect for Hot or Iced Coffee | BPA Free - Image 1](https://m.media-amazon.com/images/I/61KOCucciGL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ SEARCH NO FURTHER
*by M***1 on 20 September 2025*

I bought 2 of these, a 20 oz for my daughter to take to Uni and a 30 oz for myself (currently OOS). I don't often leave reviews, as a lot things these days are mediocre at best and crap at worst. Not these 'beasts'!!! They are amazing! The seal fits really well and is easy to put back on if you remove it for cleaning, as I do. It keeps cold drinks cold for over 24 hours and hot drinks...I had a hot chocolate in mine and forgot it had been made. 4 hours later it was still piping hot, to the point I left the lid open for it to cool down!! The eco friendly straws and cleaning brush are a bonus, you don't often get them included with flasks/mugs (my partner calls then cups, I say he's wrong and they're flasks, but hey, potato potaato 🤷‍♀️ I have bought numerous other brands, both from amazon and other places, in a long search for the perfect flask. And now I have found it. The old saying "buy it cheap, but it twice" is definitely true, as is "you get what you pay for". I actually don't mind paying more, for a product that genuinely does what it claims to do. And this product does. I have a kitchen cupboard full of plastic ones, metal ones, some leak, some are impossible to get clean, some can't go in the dishwasher, some are going rusty....I'm sure you get the picture. These Beast tumblers are worth every penny. I've spent less on others, which ultimately leak and I've spent more on one "dishwasher safe" one that is going rusty around the top now. If you are looking for a high quality flask, that can keep your drinks both piping hot and freezing cold (I'm intrigued about the icecream idea from another review 🤔) THEN THIS IS THE PRODUCT YOU NEED. What's more, there are so many different colours, with colour co-ordinated lids, the whole family can have their own with no confusion over whose is whose. Can't recommend these highly enough 👌

### ⭐⭐⭐⭐⭐ Excellent 👌🏻
*by A***R on 21 January 2026*

This Beast tumbler is amazing. Keeps my water ice cold. 900ml is a perfect size as well, not too big and not too small. Tested it for leaks by turning it upside down and shaking it. 100% leak proof. I haven't used it for a hot drink yet? Not sure I will as I mainly use it for my filtered water. Haven't used the the straws or straw cleaner either yet. Nice little extra to have nonetheless. Get one you won't be disappointed!

### ⭐⭐⭐⭐⭐ Love my mug
*by R***N on 21 June 2025*

Great size & quality. Love the colour. The lid doesn’t crack like my old one. It’s okay to hold but I’m definitely going to buy a larger one with a handle for ease and use this one for my coffee. The steel straw is narrower than my other ones which is good as I add lemon to my sparkling water drinks and worry about it eroding my teeth with wider steel straws. I’ve only knocked it over once but the lid stayed on and minimal water escaped through the sip hole. The paint hasn’t chipped like my old one. It keeps my cold drinks perfectly cold. My hot drinks hot. My only regret is not buying a bigger one with a handle. If you have smaller hands, I’d recommend a handle one.

## Frequently Bought Together

- Beast 30 oz Tumbler Stainless Steel Vacuum Insulated Coffee Ice Cup Double Wall Travel Flask (Stainless Steel)
- Greens Steel Handle for 30 oz BEAST Tumbler Only | BEAST Tumbler Handle Anti Slip Travel Mug Grip | Beast Cup Holder | BEAST Tumbler Accessories | Lightweight Tumbler Holder | Cup Handle

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-10*