Intro: Interaction Design
This is a instruction on how to make a makeshift amplifier or speaker. All you need for the are two bottles. It does not matter what type of bottle. You will need a toilet paper roll. Finally, you will need a knife or scissors.
Step 1: Step 1: Cutting Off the Bottom
The first thing you will need to do is cut off the bottom of the bottles. This will allow sound to be projected.
Step 2: Step 2: Trace and Cut
The next thing you should do is trace out the toilet paper roll. After you've done that on both bottles, you can then cut out those holes. Just make sure to cut the holes close to the back for extra reverberation.
Step 3: Step 3: Phone Slit
After that, you will take your phone and trace it onto the toilet paper roll. Then cut it out.
Step 4: Step 4: Assemble
When you've done all of that, you will then stick the toilet paper roll into both bottles. Then you just have to stick your phone in there and you're golden.