This is the title of my science homework that i need to do over the vacation. What i need to do is to roll a 2 liter soda bottle (or larger) atleast 360 degrees without doing any funny stuff (such as manually rolling the bottle or using a fan and such). There is one exception however. I can use magnets, but if you can, please give me a detailed response of how to roll a bottle without magnets. My way of rolling this 2 liter soda bottle is to glue 2 or 3 heavy non-magnetic masses on the inside of the bottle equidistant from each other. To make this roll, I place the bottle favoring two of the masses and let physics do the rest. But I've been told that putting 2 or 3 masses equidistant from each other creates a balance which will make the bottle harder to roll a 360+. To minimized friction, I've put oil on the outside of the bottle. If anybody needs more information, I would be glad to give you some. And as a note, i dont want things to be too complicated (my teacher hates it when something complicated could be explained in simple terms) so that i could make this experiment easier. and also, the bottle HAS to be rolling on a flat surface, not in the air or on a decline.