Instructables

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.


 
 
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Step 1: 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.

Step 3: Cool your jets!

Put the whole thing in the refrigerator for a few hours, uncovered.

It will take anywhere from 4 to 12 hours, depending on the quality of the Vodka, amount of sugar, and the temperature of your fridge.

You'll have to try it a couple of times to get it right. If the banana is only partially gelled, leave it in for a couple more hours next time.

Don't leave it in there for too long, though. It will turn into a runny mess!
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ak1422 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...
craig34 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.

http://www.okc.cc.ok.us/biologylabs/Images/Cells_Membranes/diffusion.gif

osmotic pressure uses pressure to force ions from a lower concentration to a higher concentration diluting the higher concentration thus achieving equilibrium.
http://www.biologycorner.com/resources/osmosis.jpg
hmm, I always thought that osmosis involved liquids and diffusion was gases only?
scree4 years ago
 mmm tasty tasty science
ELF7 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)  ELF7 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 NK57 years ago
Proof? According to the label on the bottle it was 37,5% vol. alcohole...
reeding ELF4 years ago
 proof is twice the percent i.e. bacardi 151 is 151 proof but %75.5 
Shut Up Now NK55 years ago
so if u just want a gelled banana, u could use pure alcohol. just dont eat it.
knaggs5 years ago
sweet do they taste alright i like bananas and i like vodka
MR WEED6 years ago
(removed by author or community request)
bpham07 MR WEED5 years ago
capitals hurt the eyes
Capitals mean you're shouting... Shhh...
(removed by author or community request)
How many did you have before you wrote that?! ROFLMAO
One too many it seems.
maker126 years ago
cool "alcholic bannas" good one
that looks really effing disgusting, but pretty damn cool good job bro
rasta_bhoy6 years ago
sweet. now trig will be a lot better for me
Werth6 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.
redirete6 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...
ventsi6 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?
gowithflo6 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?
CameronSS6 years ago
Bizarre! If it weren't for that whole alcoholic bit I'd make one just to turn a banana into gelatin.
OffDisplay6 years ago
Does this work with any other fruits? Maybe the Kiwi or a peach? I really hate bananas.
ELF7 years ago
Nice istructable, and quite cool :)
so... what's the science behind it?
NK5 (author)  T3h_Muffinator7 years ago
I've updated this instructable with the scientific explanation.
Sweet!
NK5 (author) 7 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)  TheCheese99217 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
PetervG7 years ago
I'm not allowed to drink Vodka.
NK5 (author)  PetervG7 years ago
That's a shame. The ethanol (Vodka) is what makes this work.
erfonz PetervG7 years ago
That's what I was thinking too. Is there some way to do this without vodka?
LasVegas erfonz7 years ago
Yea... You could use Bacardi 151 or Wild Turkey. :)
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