Masturbating

So I need some advice , when I’m with my boyfriend for me to feel good besides sex I will last on him and we will dry hump and if we are doing it for about 10 min and going really fast I will get an amazing sensation from the rubbing on my clit , what Can I use to replace this till I see him next ( anything besides a vibrater because I don’t have one and I want to masterbate now thanks girls xx