The Spillnot™ Plus, 1 Each

The SpillNot™ Plus by United Scientific is a physics demonstration tray that holds three glasses of liquid on an 8" diameter nonslip base and lets you swing them back and forth without spilling. Its flexible handle, suspended above the center of the tray, keeps forces on the liquid directed toward the tray. Physics teachers and outreach presenters use it to demonstrate circular motion, centripetal force and Newton's laws.