I don't know where to find these straw. They are usually in Asian stationary shops and such. Something like the Sanrio store but I don't think the Sanrio store sells straws. Sorry if it's not clear or I talk too much D:
by Baker Ross
by Angeles Ruiz
by Cute Stuff by JO & CO
by PRAVINA'S ART
by Beads Direct
by Shemi Dixon
by Emma Östergren