Quality Health offers sample opportunities on a lot of name brand products. The sample usually are full sized products, if not they will tell you the size.
How it works is they will send you the offers via email and what the requirements are to get your free sample. Some of these are real easy, quick little surveys (these are the good ones). Others make you jump through hoops and are not worth it.
But you can get some cool stuff pretty easy. As with all free sample type things I recommend setting up a different email address specifically for these. That way you don’t clutter your everyday email address up.