Brendan Rodgers predicted more to come from Celtic after watching his side put six past Inverness in the Scottish Cup.
The Hoops' serene progress towards a treble continued in Parkhead as Moussa Dembele's second hat-trick in as many games helped them into the quarter-finals.
Rodgers' side have now won 13 straight games and have failed to win just one of 30 domestic games this season.
That one draw came against Caley Thistle in September, but the visitors were blown away on Saturday, and Rodgers said: "I just feel we will get better as the season goes on.
"The players' attitude was first class, firstly how quickly they regain the ball, it doesn't give the opponent any time to make any sequences of passes.
"In my study of Inverness, they actually have some good technical players that can move the ball, but we never gave them an opportunity to do that.
"So defensively we were very strong, our pressing was excellent. And our attacking play was fantastic.
"Moussa will get goals. I'm pleased for him. There are other elements of his game that we work on in training that I see improving: how he receives it, his touch to move away into space is getting better.
"It was a very, very good team performance."
Inverness boss Richie Foran said: "If you're to get any result against Celtic you need at least four or five of their players to have a real off day and you need our 11 at their best. That wasn't the case today.
"There's no stopping them at the moment. You can see the confidence running through their veins. They have pace, they break on you, they've got class, an abundance of quality, on the park, on the bench, and a manager who is doing a great job."