Our take

Mumm Cuvee M Champagne California Sparkling Wine

GSW Score87/ 100

Shoppers really like it. A mechanical score from 13 shopper ratings on the store listing, checked Aug 12, 2026. It sits in the top 43% of the 514 wines we have scored, measured against the shelf on Sep 16, 2026. How we score

Style
Sparkling wine
Size
750 ml
Region
California
Shelf barcode
0852832000310
Mumm Cuvee M Champagne California Sparkling Wine bottle
Vendor listing image · stored in the Grocery Store Wine image archive

Our take

What we make of this bottle

Read the name and it points two ways. It carries the word Champagne, and it also says California sparkling wine. What we hold on record is the origin, California, and the style, a sparkling wine. So here the word Champagne belongs to the name, not to where the wine is made.

The 13 ratings it has drawn average 4.62 out of five. Its price, in our September 2026 checks, ranged from $21.99 to $30.99. The listing does not name the grape, and we have not confirmed a producer story for this bottling, so the story here ends at the origin and the style.

Our call: fine for the shopper who wants a California sparkler and does not need the paperwork behind it; origin and style are confirmed, and that is the whole case. Pass if documentation is the habit you shop by, because the grape goes unnamed, no maker's account of this bottling has been verified, and the small early count of shoppers places it below the middle of the rated wines we cover.

More from the desk.

Related bottles with a written overview and a public evidence file.

The prices we checked

Dated store checks, not a promise about your store.

The regular price can vary by store and date.

Research status

What we are still checking

Our overview above draws on the dated store feed, shopper ratings, our region and grape research, and any sourced producer facts. We are still working to confirm the current release, the full producer record, and the bottle itself, and we update this page as we learn more.

Region guideCalifornia

A little background helps this bottle make sense.

Getting to know California.

California on the label is useful provenance but weak detail about place. For these wines, sourcing disclosure, blend construction and house-style consistency carry more decision value than a generic climate paragraph.

The place

What the name means

A state-level appellation, broader than an individual American Viticultural Area. It permits a multi-region blend and does not by itself identify one climate or soil.

Weather

How grapes grow here

The state spans cool maritime zones and hot inland valleys. A California designation alone does not reveal which conditions shaped the fruit.

Soil

What lies under the vines

At state scale, sourcing and house-style construction matter more than any single soil story.

How large the region is

Reusable question
Which counties or AVAs supplied the blend, and did that mix change by release?

Places within the region

Resolution limit
County, AVA and vineyard claims begin only when the release names them.

Where this information comes from

Store listing
Price, package, product identifier, and shopper rating. Checked Aug 10, 2026.
Barcode
The shelf barcode shown here is computed from the store product identifier. It has not been checked against a bottle.
Method
Every price, rating and fact here is a dated observation. How we check.

Report a correction or bottle mismatch.