Costco sells house-brand motor oil under the Kirkland Signature label it uses for many other products. Does this oil pass the ...

Costco regulars say these overlooked items—from wipes to sardines—are some of the best bargains in the warehouse.

Wondering if you should turn to Costco or Trader Joe's for a cheap, tasty lager? We've got you covered with a detailed ...

Cheaper look-alikes have been around for years, but social media has made them more popular. Dupes can move into shaky legal ...

Costco’s iconic $5 Kirkland Rotisserie Chicken is well worth the price of membership, customers say. “If you buy a rotisserie ...

The Canadian athleisure brand has accused the warehouse club operator of copying at least six of its products, including its ...

Costco launched a private label named Kirkland Signature that put a unique spin on the concept of shopping generic. The ...

Vancouver-based Lululemon asserts that Costco sells apparel that mimics the look and feel of its products.

They crisped in the oven with ease, and had such a robust bite. They were surprisingly juicy after reheating, too. The tray ...

The warehouse giant is accused of leading customers to believe some of their products are made by the same manufacturers as ...

Lululemon is suing Costco, alleging the wholesale retailer knowingly sold knockoff versions or dupes of its popular products.

Lululemon alleges that Costco has stolen the intellectual property of its Scuba hoodies and sweatshirts, Define jackets and ABC pants.