Did you ever hear of "slackfill" Neither did I. Hit this link, it explains it..yes it is safe
It is a link called.."Scambusters" It is all about scams that affect us all..great article!!
https://www.scambusters.org/slackfill.html
(first few sentences from above article, takes maybe 5 minutes to read entire article.)
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You may not have heard of slack-filling, but it’s a part of everyday life for consumers and the products we buy.
It’s the term manufacturers use to explain why their packages are often much bigger than the products inside — like the air that bulks out bags of potato chips.
Why do they do it? Is it a scam? We have the explanations for you in this week’s issue.
Here’s something you likely have never heard of that affects you almost every time you do your grocery shopping – slack-fill.
If you’ve ever felt short-changed when you buy a product, only to find when you open it that the box or bag is way too big for what’s inside, then you’re a victim of slack-fill.
(rest of article at link above)