Costco's Kirkland Signature brand prosecco ticks all the boxes for a top quality, authentic prosecco. The taste and the price point are also factors that work in the item’s favor.

Described as being wildly effervescent with the slightest touch of sweetness and subtle notes of fruit, a bottle of Costco’s prosecco sits at around the $7 price point.

Prosecco must be made with at least 85% glera grapes and is typically made in one of Italy's appellation regions. This is related to Italy's controlled wine designation.

The DOCG ("Denominazione di Origine Controllata e Garantita") on the label of Costco's prosecco essentially means that the wine comes from a controlled and designated wine maker.

Having been tested by a panel prior to distribution, the Costco product has a guaranteed taste. The term "superiore" on its label means it has 0.5% more alcohol than usual.