Keep your reptile, fish, or plant snug and warm during transport with this 10 pack of Uniheat Heat Pack Shipping Warmers. These heat packs will keep your pet comfortable for over 40 hours without any need for external heat sources. The Uniheat brand is known for their high-quality products, so you can trust that these heat packs will do the job. It has an expiration date of 2024. While these are ideal for those shipping their pets, these heat packs also come in handy for camping trips or emergency situations.