Does a stick of dynamite contain force?

No. Force isn't something you can enclose in a box, an envelope,

or a bottle.

A stick of dynamite contains some amount of a chemical compound which,

when triggered by enough heat or shock, undergoes a chemical reaction

that proceeds very rapidly, and generates a large quantity of gases before

the gases can dissipate. This creates very high pressure around the reaction,

and it's this pressure in a small volume that exerts great force for a very short

time. The whole process is often described as an "explosion".