absolutely do NOT use copper pennies!!

a harmful gas is emitted when copper is heated

ever wonder why you never see copper pipes? =)

if you dont want to buy diffuser marbles, and are liking the loose change thing,
go with a different coin, such as a nickel

they would be much safer
BigBongHits Reviewed by BigBongHits on . Penny Diffuser I was just reading about diffuser marbles, but marbles wont fit past my ice catcher so I boiled a bunch of pennies so there nice and clean and dump them in my bong will it act like a diffuser? or is this just retarded because of using metal pennies Rating: 5