lol,
I made my first bong yesterday while HIGH.

Just keep in mind, make sure that whole where the stem is in, IS AIR TIGHT.

I couldn't get the damn thing to stop leaking so I just taped it up like a mother fucker.

Anything will work, just make sure you can cut a really good tight hole or have some super-quick drying glue/cement to hold the stem in.

I used a case to a CO2 keyboard cleaner with tin foil over the wide opening for a bowl/stem. I had to get a straw and pencap to make the stem fit into the water bottle.

It took me forever cause I was high though.