2. Slim Packing Cubes
What if you're not bringing enough on your trip to warrant big packing cubes? If you don't pack your cube fully, it ends up floppy and the contents inside end up sliding everywhere, making your suitcase just as messy as before. For moments like those (or for thinner shirts or tees) slim packing cubes are a must. It will keep everything compact and where it needs to be. 

Get it on Amazon here.