Glass Walled Puns

True story, this just happened, immediatly thought to myself typical dad joke right here. So I was making tea for myself and dad wanted some as well.

I was looking for his usual glass but couldn't find it. It looks like the one on the right in this photo: http://i.imgur.com/Uy5noxC.jpg

We only have one of those tall ones (his one) but we have a few of the smaller versions of the same style (double wall tea glass).

Exposition over, now onto the joke he made.

So as I was trying to find it, he said it broke so he asked me to pour it into the smaller glass to which I replied, "Why don't you use the mugs, they're bigger anyway". He says "Because I don't want to get mugged".

So i know the joke is old, but the application was classic...

I was with my dad buying some glass cutting supplies and the guy in the store was really dry and seemed to take his job pretty seriously. We wrapped up our purchase and the shop worker asked if we wanted a quick tour of the production facility. We said 'yes' and walked into the back. Shop worker guy showed us some bullet proof glass, and a new self obscuring glass... then he mentions that most of what they do is provide mirrors for elevators and he turns to walk us over to the last section of the facility where they do wood grain backed mirrors. My dad stops walking and says "elevators hey"? The shop worker turns and looks at him... "I hear that industry has it's ups and downs"... Shop worker guy makes eye contact with me and turns and continues his tour. While no noise escaped his lips i could feel an internal groan that shook the walls.