Said Jones: "He's clutch. Big games, big moments in games, he's a guy that every time you can rely on. He was huge again tonight."
Couture, who leads the NHL with nine goals in the playoffs, completed the hat trick with an empty-net goal with 30 seconds remaining to make it 4-2.
"We haven't won (the series), so I don't care what my numbers get to be," Couture said. "I could go this whole playoffs and have zero points, and if we win the Stanley Cup I'll be the happiest guy in this room."
Couture scored to make it 1-0 at 15:24 of the first period. After Meier's shot was blocked in front, Couture pulled the loose puck back and moved to outside the right crease before scoring with a backhand.
Meier extended the lead to 2-0 at 18:42. He intercepted a stretch pass by Avalanche defenseman Erik Johnson in the neutral zone, skated into the zone and scored short side from the left circle.