Revenue officers in Dublin, helped by detector dog Bailey, have seized 500 grammes of herbal cannabis worth €10,000.
The cannabis was found hidden in a tin of a powdered slimming product in a Mail Centre there today.
It had arrived from Canada and was destined for an address in Dublin.
In a separate operation on Monday, Revenue officers in Dublin Port seized 980 litres of wine after searching a number of vehicles arriving from France.
The wine had a retail value of €14,000 and represents a loss to the Exchequer of around €7,000.
Investigations are ongoing.