Two-character modifier meaning 'hand + shake/crank'. Old-school usage: hand-cranked machinery (
手摇收音机, hand-cranked radio;
手摇缝纫机, treadle/hand sewing machine). New usage in Taiwan and the mainland:
手摇饮料 /
手摇茶 — bubble tea and similar drinks shaken to order in a cocktail-style shaker. Today most Taiwanese will hear
手摇 and immediately think of bubble tea.