Pruvit KETO//OS NAT ketones  Make your selection from the drop down menu   All packs expire in 2025 (except Swiss Cacao 7/2024) THE 10 DAY CHALLENGE is now the NAT20 Variety (this box has 10 Charged and 10 Caffeine Free flavors) Free USPS First Class mail  Any 20 pack sold is Factory Sealed  Please email me with any questions you may have prior to ordering and I will be more than happy to answer them! Smoke free/pet free location in USA