I found this pint size blue tinted glass Mason Jar at Walmart in their craft section for under $2. (They also have your typical plain ones if you prefer that as well.) Grabbed a bottle of handsoap. I prefer the foaming ones, so I wanted that top on my mason jar. And went home and got to work!
I didn't want to mess with drilling, so I grabbed my crop-a-dile that I love!!! and cuts through soooo much! And started punching around a circle.
I kept going until the center popped out. (You may have to do another row around that one depending on the size of the pump that you are going to put in this hole. Make sure you don't make it too big though where the hole would show through on the sides of the pump when inserted.)