Instructables
This is small gift I made for my girlfriend for Valentine's day. :) Blue is her favorite color. So I decided to make something that is really blue.

First idea was to make copper sulphate crystals (http://www.instructables.com/id/Grow-Crystals/) So i was started making crystals but i failed. :( After two days i only had some small crystals and 2oz of that strange blue liquid you see in picture left...

There was only 2 hours before midnight left, and I decided tomorrow i must gift something to my girlfriend! Then I started thinking and idea shot straight to my head. I grabbed my instructables MagLite and just lighted to bottle with that solution...

This time my failure became succes!
 
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Step 1: Get stuff

Parts:
1 - Bottle with cap
3 - Blue leds
1 - 9v Battery
1 - 9v Battery clap
1 - ON/OFF Switch
Some wires
Enought liquid to fill bottle

Tools:
Knife
Hot glue gun
Soldering iron
Dremel or drill

Step 2: Making the mysterious liquid

I filled my bottle with copper sulfate solution I made from CuSO4 x 5 H2O salt. You can buy the salt at your local department store. ;)

There is a lot of different colours salts. Ammonium cobalt sulfate is shiny red, potassium dichromate deep red, ammonium dihydrogen phosphate is green. You can find best colours by experimenting.

Well you can paint your liquid, but playing with chemicals is more dangerous and fun. 
BY CAREFUL COPPER SULFATE IS HARMFUL!
I added some small shiny tinsel in a solution. They make my liquid more freezing.

Step 3: Make the cap

Design is very simple just:

1. Prepare your bottle cap.
2. Drill hole and place 3 leds in it.
3. Glue leds with hot glue.
4. Solder your leds and switch.
5. Connect leds with a battery.
There is schematics.

You can add some crystals like i did. ;)
nhoài12 months ago
Type LED are used here?
What did you use for the sparkling bits in the liquid?
eblažytė3 years ago
gražu:)
19samman984 years ago
ahhh did she luv it
that doesnt look like a heart...
ahh, ok. That's cool! Sorry, I didn't seethat pic in the 'ible.
ryanyong5 years ago
erm im really confused about the wiring can teach me how? cuz i bought few L.E.D aso burn @@..
gsmtaoufik5 years ago
thank you good job !!!!!!!!!!!!!!!!!!
DWRead6 years ago
DWReadsays: You can make a pretty greenish blue solution by putting copper in AMMONIA. Pennies may work, depending on when they were minted, but I would just go to a hardware store and buy a small copper connector from the plumbing department.
Zujus (author)  DWRead6 years ago
Just one little drawback. AMMONIA smells REALLY bad. :D
=SMART=6 years ago
nice work and quick thinking!!
Zrakkie6 years ago
well done dude!
Gonazar6 years ago
Ammonium dihydrogen phosphate does not make green, in fact, in solution it's colorless. Did you mean something else, because i'm trying for green. I went looking for a alternative and i found copper chlorate, but thats not too easy to get your hands on. I might end up just making it....
madman56 years ago
you couldve suspended a smaller heart in the liquid so it has a morenoticeable look iin the dark
Zujus (author)  madman56 years ago
Nice idea!
People, stop making fun of his English! Just appreciate what he has done. He obviously knows English isn't his forte and yet has shared this with all of us. We can't speak his language even half as well as how he speaks English. Some of you are so narrow minded! Grow Up!
Jimbo2426 years ago
This is well cool, im gonna make this my self, but how do you grow the crystals on the lid? i searched for an instrucables, but all that told me was how to grow them from a botton and wire :/ Maybe you could make another instrucable for this bit. Thank you if you do! =)
Zujus (author)  Jimbo2426 years ago
Thanks! I just glued them :)
Jimbo242 Zujus6 years ago
yeah but how did you make them in the first place, did you just make them on some string and then just filed one side so it was flat enough to be glued to the lid?
finfan77 years ago
Well wriiten instructable man. Just out of curiosity what language is it?
Zujus (author)  finfan77 years ago
Lithuanian ;) You can read more at wikipedia.
pizza7117 years ago
Oh that was sweet. Simple, but sweet. Heck, how come I never get ideas like these for my girl? He he he.:)
engrmurad7 years ago
coooool heart.wish your girlfriends heart also bluished by ur product.......its really exceptional engineeringengineering gift..........
Zujus (author)  engrmurad7 years ago
bluished??? published?
This is the coolest thing EVER. I love it! Nice job!
Zujus (author)  californiaflame7 years ago
Thank you :) I tried do best i can becouse it is for my girlfriend ;)
She is a lucky girl! Also, your English is very good. :)
Zujus (author)  katiebread7 years ago
Thanks! And I'am lucky boy becouse i find her.
Nemaniau kad ir Lietuviu geniju esama :D
Zujus (author)  angliavandenilis7 years ago
As ne genijus as tik megejas :D LABAI malonu matyt lietuvius Instructables! jei kas klausk as cia kelis konkursus laimejas ir siap zinau kas cia per puslapis galesiu padet. :)
Oabbey7 years ago
what planet are you from? i wish i could find a sweet ass boyfriend!
Oabbey7 years ago
a hot glue PISTOL, huh? helllllll yeah.
Aww MAN. Thts T-H-E most ammaaaaaaazin thing EVA! Lol, must have been PRESSURE-full moment tryna make this up in no time huh? Ur gf is shit lucky!! imma try n make this rite noW!
mever7 years ago
Another nice one Zujus
Zujus (author)  mever7 years ago
Thanks! ;)
sysadmn7 years ago
If you want a mad scientist effect, light the liquid with a UV led. If you want a UV (fluorescent) dye, the dye "fluorescein" gives an eerie green-yellow glow. Or take fluorescent poster paint and add it by the drop to water until you get the color you want. You can also use vegetable oil with some oil-based dyes. Experiment!
Zujus (author)  sysadmn7 years ago
Thats cool! I will try it ;) thanks! :)