Final answer:
Milk and milk products that have been ultra-pasteurized have sell-by dates of around 90 days.
Step-by-step explanation:
The sell-by dates for milk and milk products that have been ultra-pasteurized are typically around 90 days. Ultra-pasteurization is a process that exposes the milk to very high temperatures, around 138°C for 2 or more seconds, effectively sterilizing it. This allows the milk to be stored in airtight containers without refrigeration for an extended period of time.