Do you need to take the lid apart to scrub and clean? Or is the dishwasher sufficient?

The small insert that slides to close the opening is easily removed so that you can clean the lid well. Stuff will collect in there. Also, handwashing is recommended, the chlorine bleach in dishwasher detergent and high water temperature/hot drying will destroy the rubber seal quickly and cause faster wear to the plastics as well as reducing the seal’s strength.

does this keep coffee hot or warm after couple hours?

It does a really good job for keeping it hot for a couple of hours and warm for another 1 or two depending on your definition

Do the different sizes nest/stack well? 12oz in 20oz? 16oz in 28oz? Or all 4? Any photos of this? Trying to compare how Yeti sizes nest / stack too.

I don't know the answer. I have the 16 ounce. I would think that one could stack them. I bought the red one and it is superb. I am just guessing that they would be wide enough to stack them, but, I am NOT sure. GREAT HYRDO FLASK, though!

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Hydro Flask 20 oz Stainless Steel Reusable All Around Tumbler Black - Vacuum Insulated, Dishwasher Safe, BPA-Free, Non-Toxic

Hydro Flask 20 oz Stainless Steel Reusable All Around Tumbler Black - Vacuum Insulated, Dishwasher Safe, BPA-Free, Non-Toxic

Product ID: 538965890

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Details

Brand
Hydro Flask
Material
Stainless
Colour
Black
Capacity
567 g
Special Feature
Dishwasher
Style
Press-in Lid

🔥Maintains hot drinks for 6+ hrs

🧼Dishwasher safe for effortless cleaning

❄️Keeps drinks cold for 24+ hrs

Description

🔥 Stay hot or chill cool — your sip, your vibe.

LEAK RESISTANT LID - Slide-to-close lid keeps splashes and spills out of your way—perfect for on-the-go hustle.
CUPHOLDER COMPATIBLE - Sleek 20 oz design fits most cupholders for seamless travel and commute convenience.
EFFORTLESS MAINTENANCE - Dishwasher safe and BPA-free for a clean, safe, and sustainable hydration experience.
PURE STAINLESS STEEL TASTE - Pro-grade stainless steel ensures zero flavor transfer—sip fresh every time.
ULTIMATE TEMPERATURE CONTROL - Double-wall vacuum insulation locks in your drink’s perfect temp all day long.

The Hydro Flask 20 oz All Around Tumbler in black features double-wall TempShield vacuum insulation that keeps beverages cold for over 24 hours or hot for up to 6 hours. Its leak-resistant sliding lid and cupholder-friendly design make it ideal for busy professionals on the move. Made from BPA-free, pro-grade stainless steel, it guarantees pure taste without flavor transfer. Dishwasher safe for easy cleaning, this reusable tumbler blends durability with sleek style to elevate your daily hydration game.

Specifications

Brand	Hydro Flask
Colour	Black
Special Feature	Dishwasher Safe, Insulated
Style	Press-in Lid
Theme	Colorful
Recommended Uses For Product	Travel
Included Components	All Around Tumbler
Shape	Round
Pattern	Solid
Product Care Instructions	Hand Wash Only, Machine Wash
Age Range (Description)	Adult
Material Feature	Insulated,Dishwasher safe,BPA-free
Reusability	Reusable
Net Quantity	1.0 Count
Item Weight	340 g
Number of Items	1
League	ncaa
Is Dishwasher Safe	Yes
Pattern	Solid
Manufacturer	HYDRO FLASK
UPC	810070089641
Size	20 Ounces
Department	Unisex-Adult
Country of Origin	China
Item model number	HU-XI-48
ASIN	B0BNM13DT3

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