Cheap Portable Speaker

I made this speaker using an old telephone's reciever. It is very cheap and it works well enough but if you are looking for high sound then this isnt for you.
This idea for a lower sound emitting speaker came to me as i was facing a problem while reading a novel with my earphones on... most often than not i ended up being involved in music and nothing went into my head... so i came up with this...
Any suggestions or positive criticisms are welcome :)

please give me more ideas if possible .. ty