Nothing looks worse then an ashtray filled to the brim with cigarettes, not to mention it smells bad too. Some people have cleverly used an empty beer bottle to contain their finished cigarettes; but if you ask us that's not very classy. Those who do choose to use a bottle as an ashtray have been plagued with the possibility of accidentally taking a swig of tobacco soaked beer... We have all been there.... and it's gross. This Ingenious device combines the great features of a conventional ashtray with the convenience of a beer bottle ashtray with out the rish of sipping that gross slop ever again. Best of all the bottle Top Ashtray reduces smoldering smoke, lessens odor and makes sure you always get the cig in the hole on the first shot! This is a must have device for all who use bottles as an ashtray. This unit will snugly fit most any type of bottle. Only for use with GLASS BOTTLES. for best results fill the bottle with 1/2" of water at the bottom and disguard and replace the bottle after the cigarette exceed the water line.