How many ounces does this hold?

It doesn't say on it, so I measured it. It holds 16 oz.

is it 500ml or 550ml?

According to Zojirushi's website, it's 0.5L (500 mL) http://www.zojirushi.com/products/sweae

So what's the deal with this "lid set?" I can't figure out what function it accomplishes...

Its a check valve that allows air into the container when the contents cool. It apparently solves a problem I never had with a vacuum bottle, that leaving it to cool would make it difficult to remove the screw-top lid. Despite the overkill in complexity, it's still a great container, and keeps soup and stews hot for hours. I'm really happy with the purchase. I bought the 500 ml model, but in retrospect, for taking soup to work, the 375 ml would have been the better choice.

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Zojirushi Steel Food Jar, Medium, Black/Stainless

Product ID: 2230049

Details

Brand
Zojirushi
Capacity
17 Fluid
Color
Material
Stainless
Material Feature
Stainless

🍲2.5-inch wide opening for easy eating & cleaning

🔒Leak-proof airtight seal

❄️Keeps food hot or cold for hours

33420 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Keep your lunch legendary, wherever you go! 🍱

EFFORTLESS ACCESS - Dimples on the lid and vented design make opening a breeze, even with hot contents.
CLEAN CONVENIENT - Wide mouth lets you eat directly and clean easily—no mess, no fuss.
COMPACT POWERHOUSE - Sleek 17 oz capacity fits snugly in bags without sacrificing meal size.
PREMIUM DURABILITY - 18/8 stainless steel resists rust, stains, and odors—built to last and BPA-free.
TEMPERATURE MASTERY - Vacuum insulation locks in heat or chill for 6+ hours—your meal’s perfect temp, always.

The Zojirushi Steel Food Jar is a premium vacuum insulated stainless steel container designed to keep meals hot or cold for hours. Featuring a leak-proof airtight lid with a pressure-release vent, a wide 2.5-inch opening for easy filling and eating, and a compact yet spacious 17 oz capacity, it combines durability with convenience. Crafted from rust-resistant 18/8 stainless steel and backed by a 5-year thermal warranty, this jar is perfect for professionals who demand quality and style in their daily meal prep.

Specifications

ASIN	B003DZ0HAC
Best Sellers Rank	#341,447 in Home & Kitchen ( See Top 100 in Home & Kitchen )
Brand	Zojirushi
Brand Name	Zojirushi
Capacity	17 fluid ounces
Closure Type	Snap
Color	Black/Stainless
Container Shape	Round
Customer Reviews	4.6 out of 5 stars 805 Reviews
Food Storage Container Airtightness	Airtight
Global Trade Identification Number	04974305706997
Included Components	Lid, Stainless Steel Food Jar
Item Dimensions L x W x H	3.63"L x 3.62"W x 6.13"H
Item Form	Jar
Item Type Name	Stainless Steel Food Jar
Item Volume	17 fluid ounces
Item Weight	0.27 g
Manufacturer	Zojirushi
Manufacturer Warranty Description	5 Year Warranty on Thermal Insulation
Material	Stainless Steel
Material Feature	Stainless Steel
Material Features	Stainless Steel
Material Type	Stainless Steel
Material Type Free	BPA Free
Other Special Features of the Product	Leak Proof
Package Quantity	1
Product Care Instructions	Hand Wash Only
Product Dimensions	3.63"L x 3.62"W x 6.13"H
Recommended Uses For Product	Hot and Cold Foods
Size	1 Count (Pack of 1)
UPC	791769423598 885462985856 882576267397 787543826624 885129330258
Unit Count	1 Count

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