Best material for bowl of homemade glass bong

For more detail than what the title says:
I plan to make a homemade glass bong, and was wondering what to use for the bowl. I can use a normal black hose and connect a metal socket at the end, or the long plastic tube (lol) of a pen, and also connect a metal socket at the end.

Thanks

Edit: forgot to add, also I am open to a third option from anyone. But would still like to know which of my two is preferable. Thanks

 

Unfortunately, I cannot order anything online. I'd love to have something like this. But I have to settle with a hose or pen tube, what do you think? Thanks for the help

 

Don't even have those unfortunately

 

Thanks! I thought the garden hose would be better too