Materials required:
A steel tumbler
A white cloth
Some water
Fig.1| Step 1 : Take a steel tumbler and fill it with water as shown in fig 1.Fig.2| Step 2 : Then put the white cloth on the steel tumbler tightly on it as shown in fig 2.Fig. 3| Step 3 : Hold the tumbler with one hand while keeping the white cloth pressed to its mouth with your other hand as shown in fig 3.Fig.4| Step 4 :Turn the tumbler upside down while keeping the cloth to its mouth. Make sure that the tumbler is held vertical. Gently remove your hand pressing the cloth. You will observe that the water will not flow as shown in fig 4.
