roll-on

US /ˈroʊl.ɑːn/
UK /ˈroʊl.ɑːn/
"roll-on" picture
1.

a type of deodorant or antiperspirant applied to the skin with a ball applicator

:
She prefers a roll-on deodorant for daily use.
Don't forget to pack your roll-on for the trip.