Parade aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission. If you've never heard of the Sudoku packing method, you're not alone, ...

If you’ve spent any time on “travelgram” or “traveltok”, you might have seen the viral sudoku packing method (yes, that’s right, this packing method is named after the numbers puzzle game). This ...