[illsmosisyou]

I have a water bottle that i just found under my bed thats basically the same thing as a nalgene bottle, meaning that its made of that really hard plastic. i wanna make a bong out of it but im afraid if i try and drill a hole that it will cause cracks. what should i do?

p.s. i really wanna make a bong out of this cause the mouthpiece has a little thing similar to an ice pack that hangs down to keep the water cool. im thinking it may cool the smoke too, and that would be freakin awesome