AnSaw via Amazon offers the AnSaw USB-Rechargeable Wine Bottle String Light 3-Pack in Warm White or Cool White for $15.99. Coupon code “UVKSBLSK” cuts the price to $11.19. With free shipping, that’s the lowest price we could find by $7. Designed to be used in bottles, these lights feature USB plugs shaped like corks and 6.5-foot wires. Deal ends December 31.