You can still request a free sample from Astroglide. They have added a new “Astroglide O” Lubricant & Massage Oil to the list of available samples. Here are your choices:
Astroglide Diamond Silicone Gel
Astroglide Natural Liquid
Make sure you click the confirmation link they email you. Allow 4-6 weeks for delivery of your freebie.
If the link above does not work for you, try here.