I presume you mean a taxi ride from ZLO and not from Manzanillo itself. The city of Manzanillo is about a half hour drive in the other direction past the airport service road. The airport taxis try to get you to your destination quickly and safely and may not want to stop to allow you to shop. Likely an extra fee would be required if they did stop at Bodega (small Walmart), approaching Melaque. You will find most things you need in the many smaller stores in La Manzanilla. If you can’t find specific items, take a local bus or taxi back to Melaque several days after you settle in here.