The way you play around with your iPhone as well as other accessories are very appreciated. In this case, I want to take you one step to the natural stuffs which is iBamboo Speaker. This speaker is very simple but creative. It is made of recycled plastic but in shape of bamboo.
iBamboo Speaker is way perfect for iPhone 4 and 4S since all you need to do is to place your iPhone into the slot and it is done. Let the rest for the speaker. iBamboo will then be the speaker for better sound. iBamboo is available for $29 but now it is currently out of stock. If you want, you can check out the company page to see when it will be available.