1. decoration: The wine bottle lights is an awesome way to recycle empty wine bottles, universal for kind of bottles. The most popular warm white glow create a fairy and romantic atmosphere, ideal for birthday parties, wedding, barbecue, Halloween, Christmas, New Year or other occasions that need romantic and dreamy ambience 2. : silver made wire is anti-tangle and will not easily break off, thin, flexible and bendable that is easy to DIY shape, can ly fit in bottles or wrap around plants, window, railing, fence, shelf, balcony, furniture, etc. Rice-sized fairy LED light beads are attached to the copper wire tightly, low consumption, no overheat and still to touch even after long time using 3. Battery powered: It has pre- installed 3 PCS LR44 in each string lights, they will keep super bright for 24 hours and run for 5 days before battery die. You can use the included screwdriver to change batteries, the LED bottle lights can be reused for m times. There's no need to find power source, just turn the lights on and put it where, convenient to use 4. Cork design: The diameter of the cork is from 1.6 cm 0.6 in to 2.3 cm 0.9 in, which is the universal size for most wine bottles, fit for most glass, wine, beer, soda, whiskey bottles and other kind of bottles. Toggle the buttorn on the cork to turn the lights onoff, easy to operate