# How long can a bottle of milk last without spoiling?

**URL:** <https://boards.straightdope.com/t/how-long-can-a-bottle-of-milk-last-without-spoiling/1024672>\
**Category:** Factual Questions\
**Created:** [November 7, 2025, 6:05pm UTC](https://boards.straightdope.com/t/how-long-can-a-bottle-of-milk-last-without-spoiling/1024672 "2025-11-07T18:05:02Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![robby](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/robby/32/11048_2.png) [@robby](https://boards.straightdope.com/u/robby)\
**Post date:** [November 7, 2025, 7:17pm UTC](https://boards.straightdope.com/t/how-long-can-a-bottle-of-milk-last-without-spoiling/1024672/9 "2025-11-07T19:17:42Z")

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Actually, the [National Dairy Council](https://www.usdairy.com/news-articles/uht-milk-what-is-ultra-high-temperature-milk) draws a distinction between pasteurized milk, ultra-pasteurized milk, and ultra-high temperature (UHT) milk.

> [@National Dairy Council](#):
>
> **Pasteurized Milk**  
> Pasteurized milk is heated to **72°C (161°F) for 15 seconds**. This method of heat treatment is designed to preserve the milk’s natural nutrients while ensuring safety. Pasteurized milk must be **refrigerated** and has a **shelf life of 10–21 days**. Packaging typically involves **paper or plastic** , and the package remains **untreated**.
> 
> - **Heat Treatment:** 72°C (161°F) for 15 seconds
> - **Shelf Life:** 10–21 days
> - **Storage:** Requires refrigeration
> 
> **Ultra-Pasteurized Milk**  
> Ultra-pasteurized milk undergoes a more intense heat treatment, where it is heated to **138°C (280°F) for 2 seconds**. This process extends the milk’s shelf life to **30–90 days** under refrigeration. Ultra-pasteurized milk is packaged in **paper or plastic** , with the package being treated with **hydrogen peroxide (H₂O₂)** to ensure sterility and preserve freshness.
> 
> - **Heat Treatment:** 138°C (280°F) for 2 seconds
> - **Shelf Life:** 30–90 days
> - **Storage** : Requires refrigeration
> 
> **UHT Milk**  
> UHT milk is heated to **138°C (280°F) or higher** for at least **2 seconds** , making it nearly sterile. This high heat treatment not only kills bacteria but also allows the milk to remain **shelf-stable** for up to **6+ months** without refrigeration, until it is opened. UHT milk is packaged in a **hermetically sealed** container that is sterilized, ensuring the milk remains fresh and safe to consume.
> 
> - **Heat Treatment:** 138°C (280°F) or higher for 2+ seconds
> - **Shelf Life:** 6+ months (unopened, no refrigeration needed)
> - **Storage:** Shelf-stable, no refrigeration required

> [@Jackmannii](#):
>
> How long is it good after the sealed package is opened?

With refrigeration, ultra-pasteurized milk lasts about as long as regular pasteurized milk after it is opened.

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