Kekeke, Dara is referring to an egg shaker, a hand percussion instrument used mostly in acoustic jams. ^^ Wahhh, I can just imagine Dara and Minzy being their jjang selves with the instruments!! Woohoo! Please let there be a fancam or picture of this! ^^
Credits:
Source: 2NE1 Line
Capped by: @sillysera
oh-dara.com 
Comments on: "Line: Band Leader Dara Excitedly Shares Moments from 2NE1’s Japan Fan Club Event in Osaka" (1)
I love how Dara spends her time divided to the three other 2NE1 members. There are Chaera moments, DoublePark and now with Minzy (hope to see photos)! It’s like they are vying for her attention LOL