Some of you might have seen it already: I added a free sample with full bottle purchase(s) option on my tauerperfumes.com shop.
I offer 5 samples with the purchase of one or several bottles. In order to provide flexibility I decided to let the choice of samples to the shopper.
How to get the samples: Basically, you shop a full bottle. Continue shopping by adding a discovery set to the chart, picking your 5 samples, and get the discovery set with 5 samples credited.
The 5 samples ship in a tin box, from Switzerland, independent from where your full bottle ships.
I think that's pretty cool.
(Here's more details, on my customer service page)