Basically do the same thing, all you need is anything that will hold water and any plastic bottle with a lid(the more solid the better) and a ratchet cause tinfoil is fucking disgusting. and a lighter. I always just melt the hole in the lid and then push the socket through makes it an absolutly perfect seal cause the plastic hardens and sticks to the ratchet, melt a hole in the bottom cut offs are nice but if you just put one nice size one then you can use it for many other things aswell. If you have the gravity bong set up like so you can then light the weed with a lighter and suck through the hole and it makes a very nice pipe, just suck till you fill the entire bottle then take off the lid and inhale all the creamy smoke inside, you can also just do waterfalls as previously mentioned if you do not have an acceptable bucket around. GB's are pretty much the only way I ever smoke weed because all other ways waste way to much Good toking boys