Bestworking posted:

Why Ziploc bags are perfectly safe for sous vide cooking

No need to splurge on a vacuum sealer -- Ziploc bags are perfectly safe.

https://www.cnet.com/how-to/wh...r-sous-vide-cooking/

 

I have heard the exact same thing and I personally believe ZipLock bags are great for cooking Sous Vide but found it interesting that when I wrote Zip Lock and inquired about if they still had a  pump that was mentioned in one Sous Vide post they replied and tried to state that their bags were not approved for Sous Vide cooking and even tried to caution against using them, which surprised me.

Here is the exact reply I got from them regarding what I had written them about:

"While at one time we did offer Ziploc® brand Vacuum Freezer Bags that featured a hand pump to remove the air from the bag, I’m sorry to share this product is no longer being made. However, please note, these bags were never recommended to be used for sous vide cooking.

Additionally, all Ziploc® brand Bags are not designed or approved to withstand the
extreme heat of boiling; therefore, using Ziploc® bags to make any recipe that requires the bag to be boiled is not recommended.  Like all of SC Johnson's products, Ziploc® brand Bags can be used with confidence when label directions are followed. All Ziploc® containers and microwaveable Ziploc® bags meet the safety requirements of the U.S. Food and Drug Administration (FDA) for temperatures associated with defrosting and reheating food in microwave ovens, as well as room, refrigerator, and freezer temperatures.

Please share these facts with others who may have this misleading information. We also
encourage people to go to www.ziploc.com for more information on the proper use of this product.

Kind regards,

Jaycie
Consumer Relationship Center
SC Johnson, A Family Company "

I personally would have no problem using ZipLock bags cooking with the Sous Vide method because the temperatures used in that type of cooking with the devices specified for Sous Vide cooking do not approach boiling temps as indicated by Jaycie, from ZipLock.   I also thought that if the bags are safe for Microwaving foods in them then surely they would be okay for Sous Vide cooking as indicated in the article that you posted and cited.  I think her reply to me was more generated from a legal happy concern than anything else fearing that, in this day and time, any little thing usually means a lawsuit from someone so to cover all bases they just take the stand they took.