BookBone (TM) - Made in the USA - The ORIGINAL Weighted Rubber Bookmark - PRINTED WITH - Darwin - HOLDS BOOKS OPEN THE ORIGINAL Weighted Rubber Bookmark won't slide off even when book is tilted. BookBones HOLD BOOKS OPEN and you can TURN THE PAGE WITH ONE HAND! See use instructions on back of box. Also works as a handy JAR OPENER. Just wrap the BookBone around the jar lid, squeeze the ends together and twist! All BookBones now ship in colorful Gift Friendly Boxes (See Photo Gallery on left). We invented the Weighted Rubber Bookmark. If you find a rubber bookmark with weighted ends that does not have my BookBone U.S. Registered Trademark, it's just a Chinese knock off of my Made in USA invention. More than 120,000 sold Worldwide including more than 15,000 sold right here on Amazon! Click on Seller Link to see 100's more Seller and Product Reviews. All U.S. Merchant Fulfilled orders of 3 or more are automatically shipped via PRIORITY MAIL - Please do not select Expedited Shipping or Amazon will charge you for it! Merchant fulfilled orders are shipped from Savannah Georgia, USA. Available Unprinted or Printed with your choice from our selection of more than 40 versions of Standard Artwork. Search Amazon for BookBones to see all variations of Color and Artwork. See Standard Art and Zodiac photos for printed options.