http://www.caringconsumer.com/pdfs/coupon_purebasic.pdf -the coupon says” Call for free samples 800-432-3787 OR check out our website at www.pureandbasic.com.  The coupon came from this site: http://www.caringconsumer.com/coupons.asp
You can probably request the sample here: http://www.pureandbasic.com/contact_us/