Thanks for your answer.I think I will buy silicone based clips eventually.So I was wondering if it is okay to use those silicone inserts with regular clips on threadless bracelet for now.Maybe someone else can help me too.
According to MoraPandora, you can!
"If you don’t like any of the silicone designs that Pandora have done so far, you can always go the traditional route and use a pair of regular Pandora clips with rubber inserts."
Here are two helpful posts by MoraPandora on the topic:
http://www.morapandorablog.com/2016/03/25/review-smooth-threadless-bracelet-pandora-spring-2016/
http://www.morapandorablog.com/2016/03/27/review-silicone-clips-pandora-spring-2016/