http://www.astroglide.com/sample/ -you can choose from Astroglide liquid, Astroglide Gel, Astroglide Sensitive Skin Gel, Astroglide X Silicone Liquid, or Astroglide Natural Liquid.
–Update – they added a Diamond Silicone Gel product to the sample options.

http://www.astroglide.com/hook-me-up/ -fill out the form to get a Free Astroglide Personal Lubricant Sample. You can choose from Liquid, X Silicone, or Diamond Silicone Gel.

http://www.astroglide.com/pride/#sample-section -fill out the form to get a Free Astroglide Personal Lubricant Sample. You can choose from Liquid, Gel, Sensitive Skin Gel, Diamond Silicone Gel, X Silicone Liquid, or Natural Liquid.

http://www.astroglide.com/sample/ -you can choose from Astroglide liquid, Astroglide Gel, Astroglide Sensitive Skin Gel, Astroglide X Silicone Liquid, or Astroglide Natural Liquid.
–Update – they added a Diamond Silicone Gel product to the sample options.

http://www.astroglide.com/find-your-shade/#sample -they have a new sample available where you can select X Silicone Liquid, Warming Liquid, or Strawberry Liquid in celebration of the release of the 50 Shades of Grey movie.

http://www.astroglide.com/quantcast/

http://www.smartsource.com/smartsource/operations/samples/

http://www.astroglide.com/quantcast/

http://www.astroglide.com/maxim/