Instacart , a grocery delivery service whose workers hand pick and deliver items from trusted local stores, announced today that it is now delivering from Jewel-Osco and Petco for the western suburbs of Chicago. Beginning today, customers in these suburbs can now order from Whole Foods Market, Jewel-Osco, Costco, Standard Market, and Petco stores and have everything delivered by Instacart in as little as one hour.