Squeeze Away Stress with the SPEKS. Mini Gump 4 Pack Memory Gel Stress Balls! Say goodbye to mess and hello to stress-free fun! If you love the gooey satisfaction of slime but not the cleanup, Gump is your perfect match. Filled with a squishy, pliable gel, this stress ball is designed to bounce back every time you give it a squeeze, keeping your hands clean and your mind clear. Measuring an impressive 4cm (mini) in height, width, and depth, the Gump is perfectly sized for maximum squishability. With six vibrant, translucent colours to choose from, there’s a Gump for every mood, hand size, and personality!