1. With a mini screwdriver, it's convenient for you to open the battery box and replace the battery. When the string light is not bright, you can open the battery box to replace 3 pieces LR44 batteries. There is a clear plastic sheet near the switch, you should take it out before you switch on the light. 
2. Put wine bottle lights in the beer bottle, soda bottle, glass bottle, wine bottle, so you can save the bottles from the trash bin and turn them into a beautiful decor. You also can tangle them around the christmas tree to make it more brilliant. 
3. The 18 LEDs cork shape lights are made from a fine bendable wire that can be bent to most shapes as beautiful decorations. You can change the shape time to time if you don't like the original shape. 
4. Bottle string lights are convenient to carry and store, you can easily carry them and place the lights anywhere you like.