Cellular Factory offers the Pisen Air Blower Lens Cleaner in Blue for $3.99. With free shipping via coupon code "1733SO", that's $3 off and the lowest total price we could find by $6, although it was a buck less in our June mention. This device emits puffs of air when squeezed that can clean dust off of camera lenses or out of small crevaces. Coupon expires September 7.