In order to ensure the quality and freshness of our product while in transit, we ship via UPS Monday – Wednesday (except on major holidays). Shipments with one day transit times ship Monday-Thursday (except on major holidays). UPS ground service is only available for transit times of 3 days or less. During warmer months, typically May-September and year round to warmer climates such as Arizona, Florida, Southern California and Texas, orders will be shipped for next day delivery. All of our insulated warm weather packaging is reusable; just keep the icepacks in the freezer until you need them again.