Should bottles corked with synthetic closures be stored upright or lay down?
The reason for laying down bottles featuring a natural cork is that when cork is wet, it increases its sealing performance because it tends to swell up. In fact when natural cork dries up, it tends to shrink thus diminishing its sealing performance. Synthetic closures are not affected by this process and it makes no difference whether they are stored upright or lay down. Keeping bottles stored upright is much more convenient for wine cellars or for shops that sell directly to the public.
