Durham Dynamos dismissed the Scottish Saltires for 91 before wrapping up a seven-wicket Yorkshire Bank 40 triumph at the Emirates Durham ICG.
The hosts, now top of Group B after their fourth win, needed just 12.5 overs chase 92, meaning Scotland have now lost seven in seven encounters this season.
Skipper Preston Mommsen and ex-Warwickshire player Calum MacLeod both went first ball and the only resistance came from New Zealander Tom Latham.
The left-handed opener made 30 before he was sixth out, lofting a catch to extra-cover when clearly in danger of running out of partners; he had seen three wickets go down in five balls with the total on 39.
MacLeod gloved a leg-side catch to wicketkeeper Phil Mustard, Mommsen hooked straight to long-leg and ex-Durham man Moneeb Iqbal was bowled by Mark Wood.
The rot set in as early as the third over when Freddie Coleman shaped to drive Graham Onions and edged behind.
All went reasonably well while Richie Berrington was helping add 30 for the second wicket but he skied Wood to long-leg, where Ryan Pringle ran in to hold a good catch.
Onions bowled straight through his eight overs to take 3-26 and there were also three wickets each for Wood and Paul Collingwood, who took his in nine balls.
Scotland were all out in 23.3 overs and Durham knocked off the runs quickly, losing three wickets more through carelessness than any penetration from the quartet of medium pacers the Scots employed.
Gordon Goudie followed up his unbeaten 14 by persuading Mustard to loft a catch to mid-off, while MacLeod had Mark Stoneman lbw for 22.
Scott Borthwick edged Berrington to slip, but Ben Stokes hit an unbeaten 17 off 10 balls to see his side home.