Holland stretched their lead at the top of Group A in the Clydesdale Bank 40 with a 43-run victory over Leicestershire at Grace Road.
Michael Swart hit his maiden one-day century to help the Dutch post a competition-best total of 304-3 after being put into bat by the Foxes.
The Australian-born batsman made 102 from 100 deliveries, including posting a record second-wicket stand of 152 with Tom Cooper (68).
Stephan Myburgh had given the visitors a flying start, hitting a massive six off the fourth ball of the innings from Alex Wyatt, as he raced to 37 off 27 balls before being brilliantly run out.
Cameron Borgas, with an unbeaten 61 off a mere 33 balls, and Mudassar Bukhari produced a late blitz, 74 coming off the last six overs, as Holland posted their biggest score against county opposition.
Leicestershire's reply suffered a disastrous start when Josh Cobb went fell to the very first ball to Timm van der Gugten.
A brilliant 115 from Ramnaresh Sarwan kept the home team in contention, though the West Indian was forced to fight something of a lone hand.
Jacques du Toit was the next highest scorer with 48 and Wayne White hit an aggressive 32 but in-form Holland deservedly chalked up their third win in a row and fifth in seven matches.