I figured it would be easier to put the speed my usual measuring jug and having to make sure everything's all set up to then stir for ages and having to breath in the fumes plus having making sure I don't accidently spill or splash acetone outside the jug ,

But to instead just pour it inside my 100ml bottle of acetone for 30 min and just regularly shaking it.

Could that somehow potentially cause problems?

Oh and I Also had the idea of getting multiple small bottles so that I can just store my speed within the acetone so I dont have to be in possession of (hypothetical) Large (ish) amounts. (plus I reckon that would make it alot easier for me to pace myself and not over do it too much) But is there such thing as having amphetamines inside acetone for too long?