My daughter is on Wal Mart's free sample mailing list. So far we have gotten lots of free stuff: razors, hair care products, lotions. Some items are just the perfect size to squeeze into an already tightly packed box. Or you can do what I do and put a bunch of them in a ziploc bag. (Actually for liquids and gels like this, I put them Inside a ziplock bag, then turn that bag upsside down into the bottom of a second ziplock for security's sake.)