Most fortified wines such as Port, Madeira and Sherry use thicker and stronger bottles. The vintage Port wine bottle will have a larger bulge at the mouth of the bottle, its function is to facilitate the precipitation of the sediment on the bottom of the bottle. This kind of wine bottle is usually sealed with a cork stopper, and is particularly suitable as a bottle of fortified wine to be drunk when young.
In addition, the size of the bottle will also affect the quality of the wine. Compared with wine in small bottles, wine in large bottles has a more lasting fresh taste, because large bottles can slow down the aging of wine. However, this is also one of the shortcomings of large-bottled wines, because the wine matures too slowly, so it is necessary to wait patiently for its maturation, and it is necessary to be "pleasant" rather than "individually". Several common size wine bottle types are: small bottle (Piccolo/Split, 187.5ml), half bottle (Demi/Half, 375ml), standard (Standard, 750ml), large bottle (Magnum, 1.5L), extra large bottle (Double Magnum, 3.0L), Super Pack (Jeroboam, 3L or 5L), Supreme Pack (Imperial, 6.0L), etc.