Bluecell Black and Blue Color Eyeglass Eyewear Glasses Neck Retainer Holder Safety Adjustable Strap Rope Cord for Sport (running hiking) by Generic. $5.99. Bluecell LCD cleaner + 1.5 inch mini stylus with 3.5mm earphone jack strap. Package included: 1 x Black, 1 x Blue. With adjustable lock. Stylish design to match every outfit. These eyewear strap holders prevent the loss of valuable glasses at work, play or sport activities.