Vintage Blenko Green Crackle Glass Decanter Hand Blown w/ Stopper. Blenko 10 mouth-blown crackle glass decanter with a stopper. The decanter has a long threaded neck, and a piece of glass wraps around the neck three times. It also has a rough pontil mark consistent with blown glass. The stopper is round mushroom shape. Condition: No glass damage. The stopper appears to have damage. Upon examining the stopper insert, the flaw is smooth, no jagged edges you would find on broken glass. Therefore I ruled the flaw was caused during manufacturing. Thank you for taking a look at this listing!