Britannia Jim Jam Pops Biscuit 70gm A biscuit invention that you simply must try! Our first open creme biscuit, featuring a crunchy base, vanilla topping, and jammy core, is part of the Jim Jam family. The biscuit of the future is the Jim Jam Pops from Britannia. The "twist" days are long gone. Now just lick and pop, No Twist!