The swap that looks close
bubble wrap is the usual substitute for paper void fill, and it is the wrong one. Bubble cushions. It does not stop a book sliding in a deep carton. Fill does.
Wholesale Packaging lists Paper void fill separately because the jobs diverge as soon as the goods are on the bench.
What the right line actually does
Paper void fill takes the gap when the carton is a little larger than the goods.
Paper void fill is a separate range from loose fill, Ecoflo corn-starch peanuts and bubble.
If you have already mixed them
Packing paper fill under the goods and nothing at the sides still lets them move.
On Wholesale Packaging, put Paper void fill on the order with the lines it belongs to, so you are not paying a second delivery for the piece you forgot. Free UK delivery starts over £50 ex VAT.
Open Paper void fill when you already know this line. The product page is the pack. A handful on the bench is not the unit you are buying. Wholesale Packaging will still dispatch an order placed by 3pm on the same day.