Black and white 3D printed bookmark holders! You have your choice of design:
Death by TBR
Read in Peace
Rest in Books
Spooky Book Club
 
Measures 12cm tall x 7m wide x 4cm deep. Will fit standard sized bookmarks, or a range of other items (not recommended as a vase, unless your flowers are dried). 
 
Note: this model was designed by the talented layersingreen and I'm an authorised reseller of this design.