The bottom of this glass is designed with a very small sealed hole. It is for dissipating heat.So it’s not defect Material: high borosilicate glass Shape: high heels Capacity: 350ml, 750ml Size: 350ml: 22.5 16.5 6.5ml 750ml: 28 19.5 3ml Suitable for: bar, KTV, family party, gift, souvenir Available for: red wine, wine, champagne, brandy, cocktails After purchase we need 1-4 days to shipped it High Heels Decanter , Whiskey Bottle. Wine Bottle, Wine Dispenser, Shoe