Your butterflies will be shipped in individual envelopes. They are then packed into an insulated box with an ice pack. They will be shipped to you, overnight, either thru UPS, FedEx and sometimes the United States Post Office. Some farmers are starting to use DHL, but DHL does not overnight to all locations yet. There is an extra charge for deliveries made on Saturdays. Also, not all areas have Saturday deliveries, so checking to make sure that you can receive packages on Saturdays is strongly advised.
The butterflies are placed into individual envelopes to help protect their wings. This does not hurt them and also helps to keep them protected. Your butterflies will usually arrive the day before your event. You will want to make sure that someone is there when the butterflies arrive. You would not want them to be sitting in the hot sun. Check to see if the ice pack is still cold and that the butterflies are okay. If your ice pack is not cold, you will want to replace it. Place your butterflies in a cool place, preferably out of the direct sun. They will be fine until the next day.
On the day of the event, you will then want to get the butterflies ready for their big display. It is usually a good idea to elect one person to be in charge of the butterflies. A reputable farmer will have included instructions on caring for your butterflies and will answer any questions that you may have about them.