With the World Cup coming to an end, this is probably a little late, but still may be of use to anyone who is watching to the end (even if their team is out)!
Date Made: June 2014
Approx Cost: £0 (recycled materials)
Approx Time: 10 minutes
Step 1: Things You Need
Materials you need
* drinks bottle
* duct tape
Tools you need
Step 2: Cut Bottle
Take your bottle, and cut the bottom off, so that it is like a funnel. You can do this with a knife or scissors.
Take off the lid (but keep it safe for the bonus whistle at the end!).
Step 3: Cut and Fit Balloon
I tried a couple of different sized balloons (water bombs included) and it seems to be the smaller the balloon the higher the pitch.
Take your balloon and cut them bottom off.
Then feed it in to the lid and turn it back on itself to seal the top.
Step 4: Decorate
You can make your bottle look a bit prettier!
Use your duct tape in any way you want! I tried to make mine look like a football!
Make sure you wrap the duct tape around the cut part of the bottle so that there are no sharp edges!
Step 5: Make Some Noise
Like I said, the different sized balloons make different noises.
This is the water bomb balloon:
This is the big balloon:
I think the water bomb is the better one!
Step 6: Bonus Whistle
You can also use the lid of the bottle as a whistle.
You need to position your hands as per the photo, creating a v at the top. I have shown it with one hand only to help show the hand position - just mirror the other hand.
Then rest your lips on your knuckles and blow in to the v. It may take some practice but once you get it right you can make a really loud whistle!
Here is a demo: