I don't know if you've visited this Walmart link yet but it is a great little link for free sample products. They offer all sorts of trial size goodies from shampoos and shaving cream to laundry detergent and diapers. I sign up for most of them. Most I use. Some I take on trips. Others I keep in a small drawer in my bathroom for guests.
Just last week I had a visitor who needed a diaper and wipe. And I was able to open my handy, dandy sample drawer and get exactly what she needed. Frugal and fun!
So give it a click. Right now there are eight products being offered. Just click the ones you're interested in and another pop up window will ask for your mailing information. As a privacy & identity issue, don't forget NOT to use your actual birthday. Personally, I always make myself 10 years younger! LOL