Can the sliding mechanism on the (30oz) lid be disassembled for washing? My milky tea gets inside and is starting to get crusty/flaky...

I have the older version of the lid too. It usually comes out clean if you put it through the dishwasher but needs a good shake afterwards. You can also try holding it sideways under warm running water for a min and then vigorously shake it over the sink. Try the other side and repeat. Do this with the lid closed and opened.

Is there a way to keep the straw from rattling around? I use it in a quiet office and it so noisy.

You can get silicone bumpers that slide onto the straw on either side of the lid, to hold the straw in place and keep it quiet. Some products even come with tips as well as bumpers, in case you don’t care for the metal straw hitting your teeth. Amazon sells them. I have had zero rattling since I started using them, and I enjoy the tips, no burning your lips on a hot straw.

Just got mine in and I love it. I can tell I’ll need more straws so what size should I get? I like the wide straight one. What size is it?

I have a 40oz Beast which I love. I use the metal extra long straws, however, the regular size metal straws can work.

Can u use this cup without the straw

Mine has no vent which makes it difficult to get much liquid out. I’m considering returning it as I don’t like drinking out of a straw.

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Beast 30 oz Tumbler Stainless Steel Vacuum Insulated Coffee Ice Cup Double Wall Travel Flask (Matte Black)

Product ID: 42499309

Details

Brand
Greens Steel
Capacity
30 fluid
Color
Matte Black
Material
Stainless
Special Feature
Condensation

🔥Retains heat up to 12 hrs

🧼Pop-up lid for effortless cleaning

❄️Keeps drinks cold for 24+ hrs

$70.28

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Sip like a boss, stay cool or hot all day long!

SWEAT FREE MATTE FINISH - No condensation, no slips—just a sleek, modern look that stays flawless and rust-free.
LEAK PROOF TRAVEL READY - Splash-proof pop-up lid with secure screw-on design keeps your beverage safe on the move.
BONUS STRAW BUNDLE INCLUDED - Two unbreakable stainless steel straws plus a cleaning brush—sip sustainably and stylishly.
UNRIVALED TEMPERATURE MASTERY - Vacuum insulated double-wall tech locks in your drink’s perfect temp all day long.
PREMIUM 304 STAINLESS STEEL BUILD - Crafted from food-grade 18/8 steel for durability and zero flavor transfer—taste purity guaranteed.

The Beast 30 oz Tumbler by Greens Steel is a premium matte black, vacuum insulated stainless steel travel flask designed for professionals who demand durability, style, and superior temperature retention. Featuring double-wall insulation, a condensation-resistant sweat-free finish, and an exclusive bonus bundle with two stainless steel straws and a cleaning brush, it ensures your drinks stay pure and perfectly chilled or hot for hours. Backed by over 81,000 glowing reviews and crafted from food-grade 304 stainless steel, this tumbler is the ultimate companion for your daily commute or outdoor adventures.

Specifications

ASIN	B01N96RJZW
Age Range Description	Adult
Best Sellers Rank	#2,614 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #46 in Insulated Tumblers
Brand	Greens Steel
Brand Name	Greens Steel
Capacity	30 fluid ounces
Color	Matte Black
Customer Package Type	Traditional packaging
Customer Reviews	4.6 out of 5 stars 81,753 Reviews
Finish Types	Matte
Included Components	Straw
Item Dimensions W x H	4.4"W x 4.2"H
Item Type Name	Tumbler
Item Weight	1.2 pounds
Manufacturer	Greens Steel
Manufacturer Part Number	43201-92242
Material	Stainless Steel Alloy Steel
Material Features	Insulated
Material Type	Stainless Steel Alloy Steel
Material Type Free	BPA Free
Model Number	30ozbeastblack
Number of Items	1
Occasion	Travel
Other Special Features of the Product	Condensation Resistant, Vacuum Insulated
Pattern	Solid
Product Care Instructions	Dishwasher Safe
Product Style	Modern
Recommended Uses For Product	Travel
Reusability	Reusable
Shape	Conical
Size	30 Ounces
Special Feature	Condensation Resistant, Vacuum Insulated
Specific Uses For Product	Cold Drinks
Style	Modern
Theme	Letters
Unit Count	1 Count

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