Food Safety Report: Costco Wholesale, Matthews Township Parkway, Matthews, NC, USA 2 years ago • details 56 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Vomiting, Stomach Pain Suspected source: Cold brew mocha Onset: Less than 4 hours Duration: 4 to 12 hours Sick: 2 people Additional information: Cold brew mocha got me and my daughter throwing up, etc