Kirkland Signature Organic Extra-Virgin Olive Oil is among the best on the market. The highly hyped oil is sourced from olives grown organically throughout the Mediterranean region of Europe. The traditional is one of the warehouse’s most popular products,

Lululemon filed a lawsuit Friday accusing Costco of copying its patented athleisure designs and selling them under its Kirkland Signature brand, according to NPR. The complaint alleges Costco is unlawfully trading on Lululemon’s reputation by offering unauthorized apparel at lower prices.

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