![The blue area on the left is a pressurised air sac, with the circle above it being a valve. What is it for on a pouch of creme fraiche? : r/whatisthisthing The blue area on the left is a pressurised air sac, with the circle above it being a valve. What is it for on a pouch of creme fraiche? : r/whatisthisthing](https://preview.redd.it/tshm9nloom061.jpg?auto=webp&s=433c00e4ef102d8a61a34b7e4e687b4b159f1ea5)
The blue area on the left is a pressurised air sac, with the circle above it being a valve. What is it for on a pouch of creme fraiche? : r/whatisthisthing
![Best of Sac Party, Sacramento Magazine and CapRadio at Drake's: The Barn, West Sacramento CA, Food & Drink Best of Sac Party, Sacramento Magazine and CapRadio at Drake's: The Barn, West Sacramento CA, Food & Drink](https://www.sacramento365.com/wp-content/uploads/sites/www.sacramento365.com/images/2022/07/event-featured-the-best-of-sacramento-party-2022-1658868193.jpeg)
Best of Sac Party, Sacramento Magazine and CapRadio at Drake's: The Barn, West Sacramento CA, Food & Drink
![Frontal view of the anatomy of the parrot air sacs. In blue, Stock Photo, Picture And Rights Managed Image. Pic. BSI-5617306 | agefotostock Frontal view of the anatomy of the parrot air sacs. In blue, Stock Photo, Picture And Rights Managed Image. Pic. BSI-5617306 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/4b37a13101a578f51be0fa91501bb9fd/bsi-5617306.jpg)