Why water won’t run through the bottle ?

Things need :

            ·         Glass jar with narrow neck

            ·         Funnel

            ·          plasticine

            ·         Screwer

            ·         Water

Instruction :

                 Position a funnel in the neck of the jar.

                 Seal it tightly with plasticine.

                 Fill the funnel with water.

The water cannot flow into the jar. Now  make a hole in the plasticine , the water flow into the jar because the pressure is same inside and outside of the jar.

( i.e ) why you need to make a holes before you can pour liquid from a tin.