---
product_id: 405345243
title: "Beast Tumbler - 550 ml (20 oz), Rainbow | 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: "¥10318"
currency: JPY
in_stock: true
reviews_count: 11
category: "Greens Steel"
url: https://www.desertcart.jp/products/405345243-beast-tumbler-550-ml-20-oz-rainbow-reusable-stainless-steel
store_origin: JP
region: Japan
---

# Keeps drinks hot 4+ hrs Keeps drinks cold 24+ hrs 18/8 food-grade stainless steel Beast Tumbler - 550 ml (20 oz), Rainbow | 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:** ¥10318
**Availability:** ✅ In Stock

## Summary

> 🌈 Sip Boldly, Live Sustainably — The Beast Tumbler Means Business!

## Quick Answers

- **What is this?** Beast Tumbler - 550 ml (20 oz), Rainbow | 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?** ¥10318 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/405345243-beast-tumbler-550-ml-20-oz-rainbow-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

- • **Leak-Proof & Travel Ready:** Secure seal and durable design make it your go-to flask for work, travel, festivals, or hikes.
- • **Dishwasher Safe Convenience:** Spend less time cleaning and more time living—100% dishwasher safe for effortless maintenance.
- • **Complete Eco-Friendly Bundle:** Includes 2 reusable steel straws, splash-proof lid & cleaning brush—ditch plastic, join the green revolution.
- • **Premium 18/8 Stainless Steel:** Rust-proof, BPA-free, and built to last—because quality is non-negotiable.
- • **Unrivaled Temperature Control:** Enjoy piping hot coffee or ice-cold water all day long—your perfect companion from dawn to dusk.

## Overview

The Beast Tumbler is a 550 ml (20 oz) vacuum insulated stainless steel flask crafted from premium 18/8 food-grade 304 stainless steel. Designed to keep beverages hot for over 4 hours and cold for more than 24 hours, it comes with a splash-proof lid, two reusable steel straws, and a cleaning brush—all dishwasher safe and BPA-free. Perfect for eco-conscious professionals seeking durability, style, and superior temperature retention in one sleek, leak-proof travel companion.

## Description

Beast Tumbler - 550 ml (20 oz), Rainbow | Reusable Stainless Steel, Vacuum Insulated Cup | with + 2 Straws & Cleaning Brush | Double Wall Travel Flask Perfect for Hot or Iced Coffee | BPA Free : desertcart.co.uk: Home & Kitchen

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 | B097FF4PC6 |
| Best Sellers Rank | 11,970 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 34 in Insulated Tumblers |
| Brand | Greens Steel |
| Colour | Rainbow |
| Customer Reviews | 4.4 4.4 out of 5 stars (77,199) |
| Date First Available | 17 Jun. 2021 |
| Item Weight | 420 g |
| Model Number | HU-XI-11 |
| Product Dimensions | 9.4 x 9.4 x 9.4 cm; 420 g |
| Special Features | Insulated |

## Product Details

- **Brand:** Greens Steel
- **Capacity:** 20 Fluid Ounces
- **Colour:** Rainbow
- **Material:** Stainless Steel
- **Special feature:** Insulated

## Images

![Beast Tumbler - 550 ml (20 oz), Rainbow | 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/61MzBGzob6L.jpg)

## Available Options

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

## 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!

### ⭐⭐⭐⭐⭐ Excellent product
*by J***E on 18 February 2026*

Excellent product. Purchased for a holiday in Antigua. Keeping our drinks really cold 🤙 very impressed. Lovely to drink out of, excellent quality cups & straws. Highly recommend 🤙

## Frequently Bought Together

- Beast 20 oz Tumbler Stainless Steel Vacuum Insulated Coffee Ice Cup Double Wall Travel Flask (Rainbow)
- Greens Steel Handle for 20 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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**Shop now:** [https://www.desertcart.jp/products/405345243-beast-tumbler-550-ml-20-oz-rainbow-reusable-stainless-steel](https://www.desertcart.jp/products/405345243-beast-tumbler-550-ml-20-oz-rainbow-reusable-stainless-steel)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-23*