Greens Steel BEAST Double Wall Vacuum Insulated Cup

Last updated date: January 21, 2021

DWYM Score

9.1

Greens Steel BEAST Double Wall Vacuum Insulated Cup

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We looked at the top Insulated Cups and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Insulated Cup you should buy.

Update as January 22, 2021:
Checkout The Best Insulated Cup for a detailed review of all the top insulated cups.

Overall Take

This 30-ounce tumbler is constructed with food-grade stainless steel and has a sweat-resistant powder-coated exterior.


In our analysis of 19 expert reviews, the Greens Steel BEAST Double Wall Vacuum Insulated Cup placed 3rd when we looked at the top 8 products in the category. For the full ranking, see below.

From The Manufacturer

EXCLUSIVE BONUS BUNDLE - Offering unrivaled value for money: 2 unbreakable straws: 1 curved; great for water + 1 wider & straight; ideal for shakes & smoothies + a straw brush & our upgraded pop up lid for super easy cleaning! Presented in a beautiful Gift Box. With so many second-rate tumblers available on the market we wanted to set ourselves apart and be the best! #1 INSULATION & TEMPERATURE RETENTION - Over engineered and tested against leading brands. Our Tumblers match performance all day long and with our splash proof closable lid you can keep your drinks insulated and protected for longer! #1 PREMIUM QUALITY - While other steel tumblers out there may use a cheaper 201 steel finish; we've cut no corners! Made only from the Highest Quality Premium 304 18/8 Food Grade Stainless Steel. #1 SUPERIOR FINISHING INSIDE & OUT - Your tumbler will always feel smooth to the touch with a sweat-free design, and will keep its stylish colorful finish due to its long-lasting powder coating. No rust or scratches like painted exteriors. An electro-polished interior will ensure your cups remain pure, imparting NO unwanted flavors, giving you a clean tasting drink every time! LIFETIME GUARANTEE & 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. All Greens Steel Products come with a LIFETIME GUARANTEE! 100% Satisfaction or your money back. Order now and put us to the test! Don't settle for any less.

Expert Reviews

Expert Summarized Score

9.0
3 expert reviews

User Summarized Score

9.4
29,071 user reviews

What experts liked

Sweat-free design. All-day performance. Two steel straws.
- Tom's Guide
Top notch insulation. Two steel straws and cleaning brush included.
- Tech Gear Lab
It did come with a regular metal straw, a thick metal milkshake straw, as well as a cleaner brush, to its credit.
- Wired

What experts didn't like

Bulky design. Unknown warming time.
- Tom's Guide
Didn't fit in narrower cupholders. Lid pops off easily.
- Tech Gear Lab
But the rubber seal around the lid is thin and easily comes out of place.
- Wired

An Overview On Insulated Cups

Nothing can ruin a morning quite like taking a sip from your coffee mug only to discover that your beverage is unappetizingly lukewarm. Thankfully, there are tons of insulated cups on the market that are ready to rescue you from enduring such an experience. And there are loads of variations, from petite mugs that are perfect for camping to giant tumblers that are sure to quench your thirst throughout the workday.

In addition to keeping hot drinks warm and cold drinks chilled, insulated mugs are also designed to prevent spills. Some have sippable snap-seal lids, while others come with reusable straws made of plastic, rubber or metal.

Many cups that effectively maintain the temperature of hot and cold beverages have vacuum insulation, which relies on a vacuum (a space that has been emptied of air) to slow the spread of heat and cold.

Vacuum-insulated cups, which are typically made of metal or glass, have both an inner and outer wall that is separated by a thin layer of vacuum. The outer walls have a reflective coating to keep heat inside the inner chambers; meanwhile, convention (how heat rises and cold sinks — causing the loss of heat) is prevented by the cup’s lid.

That’s why vacuum-insulated mugs and thermoses are a great investment if you want to keep a cup of java hot for hours.

The Insulated Cup Buying Guide

  • A tumbler is a type of insulated cup that is commonly used to hold cold drinks (though many tumblers can accommodate hot beverages, too). The cups have no handle and come with a lid and straw, making them great for filling with ice water, smoothies and more.
  • After frequent use, your insulated mug may develop stains, particularly if you use it to drink coffee or tea. Remove the stains by rinsing your mug with a solution of distilled white vinegar (1/2 cup), baking soda (1 teaspoon) and dish soap (a few drops). Be sure to rinse the cup with warm or hot water and dry it thoroughly afterward.
  • Don’t put your insulated mug in the dishwasher unless the manufacturer’s instructions tell you to do so.
  • Insulated cups aren’t typically microwave-safe.