The 8 Best Kirkland Signature Products, Ranked

Kirkland Signature is Costco's house brand, and it's earned a reputation for punching well above its weight. Many items are made by the same manufacturers as premium name brands. Here are the eight best.

8. Kirkland Signature Garbage Bags

Made by the same company that produces Glad bags, these are virtually identical in strength and durability at roughly half the price. The 50-gallon outdoor bags are especially good value.

7. Kirkland Signature Laundry Detergent

Consumer Reports has rated this as a top performer multiple years running. At $0.12 per load, it beats Tide by 60% on price with comparable cleaning power.

6. Kirkland Signature Batteries

Manufactured by Duracell (confirmed by teardown analysis), these AA and AAA batteries perform within 2% of the name brand in independent testing. The 48-pack pricing is unbeatable.

5. Kirkland Signature Colombian Coffee

Roasted by a well-regarded specialty roaster, this whole bean coffee consistently scores 85+ in blind taste tests. At roughly $11/kg on sale, it's a fraction of the price of comparable specialty beans.

4. Kirkland Signature Vodka

Rumoured to be sourced from the same distillery as Grey Goose (both use water from the same French aquifer), this vodka wins blind tastings against bottles three times its price.

3. Kirkland Signature Olive Oil

Imported from Italy and regularly tested for purity, this extra virgin olive oil beats many premium brands in independent quality assessments. The 2L bottle is a pantry essential.

2. Kirkland Signature Diapers

Parents swear by these. Made by a major diaper manufacturer, they perform comparably to Huggies at a significantly lower price point. The overnight version is particularly well-reviewed.

1. Kirkland Signature Rotisserie Chicken

At $7.99 — a price that hasn't changed in years — this 1.4kg rotisserie chicken is a loss leader that Costco refuses to raise despite losing money on every bird. It's the ultimate Costco value.