Mystery jar #2

A few days later I brought in a new jar with a mystery substance inside.  Once again, I brought it from home so it was safe.  Here is what they said:

Sight:  blue, water, sea water, melted jello, gatorade
Smell:  yuck!, stinky, vinegar chips, poison, perfume
Touch:  water, cold, smooth
Hear:  echo of the container it is in, nothing

Next we will get to experiment!