Leinster Lightning made it two from two in their short trip to Cork with a second convincing win over the Munster Reds at The Mardyke.
Balbriggan's Chris De Freitas top scored with 45, while there were 30's from Sam Harbinson, Tim Tector and Lorcan Tucker in a total of 242.
Chris De Freitas
Peter Francis claimed 4-43 - the best figures on debut in the 50-overs Cup, while there were three wickets for Gareth Delany and two for Liam McCarthy.
The chase was a bit of a car wreck as Munster's fragile batting was again found wanting against a youthful Lightning bowling unit.
Fionn Hand took 3-39, while there were two wickets apiece for Irish U19 international Reuben Wilson and John McNally in the 123-run win.
Lightning's win moves them up to third in the table, and means that the Northern Knights will be crowned champions if they can secure a bonus point win against bottom of the table Warriors at Eglinton next week.
INTERPRO 50-OVERS CUP
Munster Reds lost to v Leinster Lightning by 123 runs
Mardyke, Cork, 8 August.
Leinster Lightning 242 (44.3 overs; Chris de Freitas 45, Sam Harbinson 38, Tim Tector 32, Lorcan Tucker 32; Peter Francis 4-43, Gareth Delany 3-31, Liam McCarthy 2-49)
Munster Reds 119 (26.1 overs: Gavin Hoey 3-18, Fionn Hand 3-39, Reuben Wilson 2-20, John McNally 2-20)