im made hundreds of homemade bongs, and ipes, and so far the sobe bottle hits me harder than alot of the others..... of course not all tho. the way i made it was i put a hole in the lid and used a rubber stopper and a stem with metal cone shaped bowl. and the nail and the hammer works best for the bottom if u get the right sized nail. the key to the entire this is getting the perfect sized hole at the bottom bcuz thats how fast and steady the water goes out. reccomend try it, took me 10 minutes to make, with the right equipement, and made well.