Gel-O-Shot INSIDE A Banana!

Picture of Gel-O-Shot INSIDE A Banana!
Make a Vodka Gel-O-Shot INSIDE A SEALED Banana!

I'll show you how to use Osmotic Pressure to gel the inside of a banana.

This also works as a great magic trick for your next party.

Step 1: What you need

Picture of What you need
You'll need:

  • An almost ripe banana
  • Some Vodka (Better quality = better results)
  • 1/4 to 1/2 cup sugar
  • Tupperware©-like plastic container
  • Refrigerator

The banana needs to be almost ripe in order for the skin to become semipermeable enough to allow the Vodka (ethanol) to pass through it via Osmotic Pressure.

Ethanol is a great solvent for biological molecules.

The sugar will encourage coagulation of the liquefied banana interior.

Refer to step 4 for a detailed scientific explanation.
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ak1424 years ago
How long does it stay like that in ambient temperature? Or does it need to be eaten right away?

The reason I ask, it would be a great prank to play on my coworker... who likes to eat his banana in the office in the middle of the morning... I'd just switch his banana with a jello banana. However, that would imply that it would sit there for a while in office temperature...
craig35 years ago
I see in the photo you poured the vodka into the sink, are you able to pour it back into the bottle and keep using it for other drinks, rather than just pouring it away?
osmosis is diffusion with water. i think the correct term you are looking for is diffusion.

if i remember correctly, this thing is not an osmotic pressure system. it is just normal osmosis. osmosis works by allowing ions to travel from an area of high concentration to travel to a area of low concentration to cause equilibrium. equilibrium is the "balancing" of the ions on both sides of the membrane (in this case the banana peel) im not sure of the EXACT science of what permeates the membrane in this expirament but im sure it is diffusion.


osmotic pressure uses pressure to force ions from a lower concentration to a higher concentration diluting the higher concentration thus achieving equilibrium.
hmm, I always thought that osmosis involved liquids and diffusion was gases only?
scree5 years ago
 mmm tasty tasty science
ELF8 years ago
So I found a nice banana, yellow with a hint of small brown spots, no greenish tints anywhere. I poured a relatively cheap import vodka into an IKEA dish untill the banana was just covered (floating a little, the top of the banana was always just above the surface though) I then saturated the vodka with sugar, took about 4 big spoons, couldn't dissolve it all. I then placed the container in the refridgerator, which is only about 2 degress celsius. After about 24 hours I took it out, and peeled it... Still a normal banana. So what did I do wrong? :S
NK5 (author)  ELF8 years ago
That's odd. It could have been the cheaper Vodka. What proof was it? The higher the proof, the more ethanol content, which is what you need for this to work correctly.
ELF NK58 years ago
Proof? According to the label on the bottle it was 37,5% vol. alcohole...
reeding ELF5 years ago
 proof is twice the percent i.e. bacardi 151 is 151 proof but %75.5 
Shut Up Now NK56 years ago
so if u just want a gelled banana, u could use pure alcohol. just dont eat it.
knaggs6 years ago
sweet do they taste alright i like bananas and i like vodka
maker127 years ago
cool "alcholic bannas" good one
that looks really effing disgusting, but pretty damn cool good job bro
rasta_bhoy7 years ago
sweet. now trig will be a lot better for me
Werth7 years ago
too... many... scientific... words...
Interesting refrigerator contents; water, beer and banana shooter. Not a lot of nutritious clutter in the way, I like it! Got to admit the banana does look rather gross afterwards.
redirete7 years ago
Wash well the banana.... it can be full of Herbicide.
How ever on wikipediawikipedia you can read some chemicals that are not very safe...
ventsi7 years ago
nice one i remember my student years
It seems like a waste of Vodka to use that much for one banana. Can you use the same liquid for more than one? or does it go bad?
gowithflo8 years ago
the stuff you poured down the drain, was it gross tasting? inalcoholic? why did it go down the drain? would it be poissible to check and see if the banana gelled and if not the put it back in for awhile?
CameronSS8 years ago
Bizarre! If it weren't for that whole alcoholic bit I'd make one just to turn a banana into gelatin.
OffDisplay8 years ago
Does this work with any other fruits? Maybe the Kiwi or a peach? I really hate bananas.
ELF8 years ago
Nice istructable, and quite cool :)
so... what's the science behind it?
NK5 (author)  T3h_Muffinator8 years ago
I've updated this instructable with the scientific explanation.
NK5 (author) 8 years ago
Jello© is a registered trademark, which is why this is called Gel-O-Shot.
I really don't think jell-o will sue after all its pretty much free advertising
NK5 (author)  TheCheese99218 years ago
You would be surprised how aggressively companies protect their trademark. They've gone after popular bars to get them to quit advertising Jello Shots. They've also made it illegal to sing the US Happy Birthday song in restaurants, which is why Red Robin and such places have their own tune.
good instructable by the way, nice and clear, easy to follow, nice pics to. hmm looks a little wierd though (final product) i bet a nibble of that will put you over the legal BAC hehe. i would try it if i was of the drinking age
PetervG8 years ago
I'm not allowed to drink Vodka.
NK5 (author)  PetervG8 years ago
That's a shame. The ethanol (Vodka) is what makes this work.
erfonz PetervG8 years ago
That's what I was thinking too. Is there some way to do this without vodka?
LasVegas erfonz8 years ago
Yea... You could use Bacardi 151 or Wild Turkey. :)
NK5 (author)  erfonz8 years ago
Not that I know of. The Vodka and sugar are what makes this trick work.
All that wasted booze, lol I can't even drink

You should listen to You drink you drive you spill your beer by: NOFX
crapflinger8 years ago
does it still taste bannanaish once it's done? or...more like pure gelatenous vodka?
NK5 (author)  crapflinger8 years ago
It tastes like a Banana Jello© Shot!
NK5 (author) 8 years ago
I've just updated this instructable with a scientific explanation. Several people have emailed me asking for it. Enjoy.
would it work if you get all the alcohol out of the vodka? just heat it up on something outside and eventually the acohhol will all be gone
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