Making a bong with household materials, or while on the go
What You'll Need:
*One 20 ounce plastic bottle (or smaller size, you can get creative here)
*a pen that can be taken apart
*popcan or aluminum foil
*electric tape (duct tape will work, but electric tape is for optimal sealage lol)
*knife or other sharp object to cut with
*whatever your gonna fill it with (water, soda..sobe green tea is bomb)
Puttin it together
*First, you might as well take the pen apart. all you want is the plastic tube. this is your downstem.
*Next, cut a hole in the bottle just big enought for the pen to fit in. a slit will work as well, and you can just seal it later. *be careful while handling sharp objects, adult/parent supervision required*
*Insert the hollow pen tube into the hole at a downword angle, facing the bottom of the bottle, and slide it to the edge.
*Now take your pop can. Using the knife again, (and being extra careful this time cuz theres more than one way to fuck your fingers up now) cut a rectangle out of the pop can. Or, if your using aluminum foil, cut a piece of foil an inch by two inches is rough measurements. a picture's worth a thousand words..
*Next, take your foil rectangle, and using those spliff rolling skills we know you have, roll the foil into a cone. I used the tip of a pen to shape it a little easier
*Now that you have a foil cone, (your bowl) insert it into the hollow pen tube sticking out of the side of your bottle. make sure its in there tight, you can use some tape to hold it in there, although you might taste that tape later and isnt advised.
*Your Mcguyver bong is almost complete. Now you can seal where the pen tube meets the edges of the bottle to make sure you have an airtight seal, make a carb by poking a hole above the water level...any mods you want lol
as slater from dazed and confused says..."its no good, yourd gettin air in from here...use a little gum around the base there". haha, whatever works to seal it!
*Now fill it with your choice of liquid just enough to cover the bottom of the pen tube inside in the container.
* Fire in the hole!!!!!!!!!!!
Way to complicated. You want a quick and simple piece that will knock you on your ass just make a Gravit Bong. 
BTW I like the "Little Younger" Comment. 
it's all good. but seriously
ill try again