Is their a way to make my iphone 5s speaker louder?

Is their anyway I can make the speaker on my iphone louder? Or is their any cheap loud bluetooth speakers I can buy for it?

Put it in a bowl.

Putting it in a cup or a bowl is a cheap easy way to amplify sound. If you are watching a video while holding it in your hand, make a cup with the hand you're holding your phone with on the speaker side of the phone, this will amplify the sound.