The Packaging toggle on the product details page is used for items like a box, gift wrap or tissue paper.
The Weight and Price of the packaging product are not used when calculating the Order Weight or Order Value for the end customer but will show when it comes to invoicing the 3PL Client.
To turn on the Packaging toggle please do the following:
Click Products then Overview.
Find the product.
Click Actions then Edit.
Next, click the Extra Details tab.
Turn on the Packaging toggle.
Click Save and repeat for your other products.