Picture of Make a whistle from bottle-tops.

We've all heard the amazing loud "survival whistles" made from bottle-tops or acorn caps.

I wanted to make something more ... controlled.

(you can probably work out what to do just by looking at the photo, but read on.)

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Step 1: What you need

Picture of What you need

I made this with two soda bottle caps and a piece of drinking straw, using hot-glue, my Leatherman and a drill with a twist-bit for wood (I'll warn you in advance that the hole in the caps must be drilled - if you melt the hole, the edges will be too rounded to make the whistling noise you need).

Step 2: Drilling and ripping

Picture of Drilling and ripping

Drill a hole in one of the caps, somewhat off-centre.

Inside the cap, rip out the lining of the cap from around the hole - this makes the edge of the hole thinner, and better at splitting the air.

Step 3: Gluing

Picture of Gluing
Once you've ripped out the liner, glue the two lids edge-to-edge.

I used hot-glue, because the two caps had slightly wonky edges.  The hot-glue filled in the gaps nicely.

Step 4: Adding the straw

Picture of Adding the straw
Squash a piece of drinking straw into a flat oval, and experiment with positioning it at the hole whilst blowing.  It needs to blow across, yet slightly downwards.

When you have the best position figured out, tack the straw in place with a couple of drops of hot-glue, check again that the position is correct, then add more glue around the straw to hold it in place.

I also trailed a couple of strings of glue over the straw, with the idea that they would keep the straw in the correct oval shape.  I don't know if they are actually needed, but they didn't damage anything...

Anyhoo, there you go - the whistle has a pleasant tone, a bit like a small train-whistle, and is not so loud that small children will run screaming from the room, or get in major trouble for playing with it in the house.
boom man562 years ago
its soooo cool. I made one and it works!!!!
Kiteman (author)  boom man562 years ago
I'm gonna make this right now!!!!!
O, wait, homework first...
I'm gonna make this a.s.a.p!!!!!
Kiteman (author)  emilyvanleemput2 years ago
Cool - post a picture (or a video?) when you do!
Is that you because Wilgubeast's picture of you as Feature Author was different.

You look younger...

Kiteman (author)  blinkyblinky3 years ago
They're both me, just several years between projects.
That's cool...
A very small and simple "Ocarina". Pitch is affected by the size of the holes, and can also be adjusted by "Shading", bring something CLOSE to the hole don't cover it completely and notice the change in pitch, (about a semi tone). It's the way a "Bosun's Call" works.
poza3 years ago
mine isn't working - what size hole did you drill here? i noticed the side hole is 3mm, but you don't mention the size of the top hole.

also, i wonder if the size of the straw matters - both width AND length.

once i get this to work, i was thinking of trying two peanut butter lids and a barrel from an ink pen.
NinjaBoy12 poza3 years ago
i had to make a really big hole for it to work
just try making a hole then blowing over it if it doesnt sund make it bigger
Kiteman (author)  poza3 years ago
The whistle is very sensitive to the precise angle the air hits the edge of the hole, and I found that it worked better when I slightly flattened the straw.
NinjaBoy123 years ago
i tried very hard to use the wistle and every time i found the spot for the straw and picked it up to put glue underneath it it lost all its sound and didnt work. i also couldnt get the straw to stay flat. HELP!!!!
Kiteman (author)  NinjaBoy123 years ago
The straw will stay flat enough if you squeeze it hard and crease it.

If the position is proving fiddly, try a small blob of modelling clay or blue tac:

Stick the straw roughly in place, then fiddle until it's right, and while the clay holds the straw still, glob around it with the hot-glue.
Kiteman (author)  dragonmamath3 years ago
Thank you!
Mutantflame3 years ago
Nice whistle!

How did you enter this in the contest? I thought it was only open to those who live in the US or Canada? Have I been missing something?

I haven't made any contest entries because they all say that you can't enter if you live in the UK.

Kiteman (author)  Mutantflame3 years ago
I'm hoping that they beat the lawyers into submission before the contest ends.
But, if you were to win, to where would you send the prizes? Or would instructables just refuse to send them to you and send them to second place instead?

You got my vote nonetheless.
I like your way of thinking.
Kiteman (author)  Mutantflame3 years ago
(The "how" is "tick the box to enter the contest" - the website system doesn't know where I am, because Instructables don't keep a record of members' addresses. They will only officially know where I live if I win, and they need my address.)
randofo3 years ago
Video or it didn't happen! ;-)
Kiteman (author)  randofo3 years ago
I'll have to mug a small child - I think Conker-X accidentally gave it to his friend.
At least you've got your own mugs to do that with now!
+5 internets for you for making Kiteman *facepalm*
It's taken a LOT of work.
Kiteman (author)  Kryptonite3 years ago
>face palm<
Kiteman (author)  randofo3 years ago
New step five!
bajablue3 years ago
This is EXCELLENT for someone who is whistle-challenged... and that would be me! ;-)

Kiteman (author)  bajablue3 years ago
hrodriguez73 years ago
i'm havin' FUN man!!!!
this things awsome!
i'm stating to get dizzy, though......
Kiteman (author)  hrodriguez73 years ago
Cool, but maybe you should sit down for a while?
Thanks. Is so easy, funny and free whistle.or OCARINA ( aztec instrument) Show me more!!!!
rimar20003 years ago
Nice! my little granddaughters will be very happy with it.

It is almost an ocarine, you could name it "ocar" or so. VOTED.

Was a good idea to hire Robert de Niro for the video! The project deserves it.
Kiteman (author)  rimar20003 years ago
Haha, thank you!