https://www.sendmeasample.net/ – register and install either the Alexa Skill or the Google Assistant Skill here(depending on which voice assistant you use).  Once you do that, say “Ask Send Me a Sample for Weleda” and go through the steps to request it.  If you want to use Alexa, you can download the Amazon app here. It should show up in your order history here when you’re done.   
Update– you can order it through this link without using the voice assistant now.