From the YarnTree website: The Tacky Bill is a unique colorful beading accessory. Inside the acrylic box, both top and bottom areas are covered with an acid-free tacky surface. Just pour your beads on and never worry about spilling again. Since they’re ‘stuck’ on there... you simply pick up each bead with your needle as you need it. A good place to pour and work with your beads. Perfect for travel or at home. Two-sided snap close case measures 4¼" square and and 7/16" thick. Assorted colors; front cover color and back cover color may vary.