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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Description

❄️ Stay Cool, Sip Smart — The Ultimate Travel Tumbler for the On-the-Go Pro

TEMP SHIELD TECHNOLOGY - Double-wall vacuum insulation locks in cold for hours, keeping your drink perfectly chilled
EFFORTLESS CLEAN CARE - Dishwasher safe design keeps your tumbler fresh and vibrant without the hassle
TRAVEL READY DURABILITY - Stainless steel build with a sturdy handle designed for your busiest days and wildest adventures
HYDRATE MORE REFILL LESS - Generous 40 oz capacity means fewer refills and more hydration on the go
LEAK RESISTANT SIP ANYTIME - Press-in lid with flexible straw ensures spill-free sipping anywhere, anytime

The Hydro Flask 40 oz Travel Tumbler combines advanced double-wall vacuum insulation with durable stainless steel construction to keep your drinks cold for hours. Designed with a leak-resistant lid, flexible straw, and a sturdy handle, it fits most cupholders for seamless travel convenience. BPA-free and dishwasher safe, this tumbler ensures pure taste and easy maintenance, making it the perfect hydration companion for busy professionals and adventurers alike.

Specifications

Brand	Hydro Flask
Colour	Pink
Special Feature	Double Wall, Durable Handle, Flexible Straw, Vacuum Insulated
Style	40 Oz
Theme	Tribal
Recommended Uses For Product	Home, Travel
Included Components	Tumbler
Specific Uses For Product	Cold Drinks, Hot Drinks
Shape	Round
Pattern	Solid
Product Care Instructions	Dishwasher Safe, Machine Wash
Age Range (Description)	Adult
Material Feature	Insulated
Reusability	Reusable
Net Quantity	1.0 count
Product Dimensions	14.2W x 32.3H Centimeters
Material Type Free	BPA Free
Number of Items	1
Pattern	Solid
Finish Type	Smooth
Manufacturer	Hydro Flask
UPC	810096853837
Size	40 Ounces
Department	Unisex-Adult
Country of Origin	China
Item model number	TT40PS678
ASIN	B0C353845H

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