A nice detailed explanation.. If you don't have a friend wit you just use a potatoe masher..

Best use a glass funnel because most people fuck up and burn the plastic bottle when they try to serrve a spot.

like endo said it is very common in nz although most people im wit prefer to roll a jay or cone it because they get too wasted..

I've had alot of practice with spots (have them every session unless im with other people) I don't know about taking whole joints as spots (depending on the size of the joint a racehorse yeah) because if you got just a lil funnel most of the smoke would be floating ut the bottle.. best use a 1l glass bottle. and I have only seen people get worse coughs from spots not better.. one guy coughs up bad .. he rolls on the floor coughing then ends up spewing from coughing so much.