In the Victorian era, if you were serving liqueur to a guest, you would serve it from an elegant decanter which had a stopper. You as the hostess would remove the stopper, pour your guest their drink then hand it to them. The key here is what you did with the stopper. If you replace the stopper back on the decanter, your actions are telling the guest that here is a drink, enjoy, but there will be no more. If you hand your guest their drink and place the stopper on the table next to the decanter, you are telling the guest, here is your first drink and you are welcome to have more if you wish.
In the Victorian era, if you were serving liqueur to a guest, you would serve it from an elegant decanter which had a stopper. You as the hostess would remove the stopper, pour your guest their drink then hand it to them. The key here is what you did with the stopper. If you replace the stopper back on the decanter, your actions are telling the guest that here is a drink, enjoy, but there will be no more. If you hand your guest their drink and place the stopper on the table next to the decanter, you are telling the guest, here is your first drink and you are welcome to have more if you wish.