Smiley360 offers an O.B. Original Super Tampons 40-Count Sample Box or an in-store coupon to get a full-size 40-count box for free when you complete this survey. (It's unclear which item you will receive; supplies are limited.) That's a savings of about $6 compared to buying a 40-count box in local stores. Allow six to eight weeks for delivery.

Note: Be sure to answer select "Tampons" and "Yes" as answers to the survey questions to qualify for this offer.