Costco: 8-Piece Stackable Acrylic Tumblers $8.99

*UPDATE* 4/10/14. Costco has the 8-Piece Stackable Acrylic Tumblers on sale for $8.99 (after manufacturer’s instant rebate), now through April 20, 2014. That is $3 off Costco’s regular price of $11.99. This package comes with a set of eight stackable tumblers in beautiful jewel tones (one of each color). There is also another set of clear white tumblers. Each cup holds 12 fl oz/ 355 ml. Top rack dishwasher safe.…