You put these two things together, the net result is that all side forces on the glass are small and are mainly dominated by aerodynamic effects, which at these speeds are negligible.
把这两个事实和在一起，最终结果 是玻璃杯上的所有侧力小， 又主要受空气动力学效应控制， 因此这些速度是微不足道的。