请据图分析回答:
girls, we have many skirts, are very nice.
如图所示,一个未装满水的瓶子,正立在水平桌面上时,瓶对桌面的压强为p1,瓶底受到水的压力为F1;倒立时瓶对桌面的压强为p2,瓶盖受到水的压力为F2,则p1____p2,F1____F2.(选填:“大于”、“小于”或“等于”)