It was the one major blemish on Brendan Rodgers' CV upon his return to Celtic last season.
A last-16 League Cup defeat at the hands of Kilmarnock in August 2023 saw the chance of another treble slip before the season even really got going.
Marley Watkins scored in a deserved victory for the Ayrshire side.
Now, Celtic are looking to make amends and reclaim the trophy they've so often lifted in recent times.
Here's everything you need to know about their knockout tie with Hibernian...
When is Celtic vs Hibs?
Celtic will take on Hibs today - Sunday, August 16.
The match will kick-off at 3pm.
It will be played at Celtic Park, Glasgow.
Is Celtic vs Hibs on TV and can I live stream it?
Yes, thankfully the match will be showcased live on television.
As rights holders to the competition, Premier Sports will broadcast the match on their Premier Sports 1 channel.
Subscribers will also be able to live stream the game via the Premier Player online.
Team news
Kyogo is a doubt heading into this one after sustaining a knock against Hibs at Easter Road last weekend.
So, that could mean a full debut for Adam Idah after the Republic of Ireland striker put pen to paper on a permanent deal having completed his transfer from Norwich City this week.
Given it's the cup, Rodgers may see fit to rotate some of his squad to allow for fringe players to get a chance in the first team.
However, with the Hoops playing week to week at the minute, they are getting plenty of rest in between games as things stand, so it may be the strongest possible XI for the champions.
