If you're producing products that occasionally are in demand by your clients with less than a day to fulfill the order, you need a great same day courier service. There are companies that can take less than 24 hours (often faster) from the moment you place the call to get the delivery into your client's hands.
Speed is a consideration when talking about these types of couriers. You can save a lot of money by shipping through other means if speed is not crucial. If your reputation and the success of your business are hinging on making deliveries as fast as possible though, you'll need a great same day courier delivery services.
Price is also obviously going to be a consideration when you're shipping anything under this model. You can expect the price to go up based on the size of your shipment, and the speed in which you need it delivered.
You will have to actually request quotes from your potential providers in order to get an accurate price assessment. Be aware though, that you can save money by pursuing volume shipping in many cases. Remember that there can be a tradeoff between timeliness in deliveries and the price at times.
When you look at some courier companies, you may find a lower rate, but you may also see that they have a lower success rate of making deliveries on time. When you're looking for a great same day courier, you also want to find one that has a fleet that provides you with a large selection of vehicles.