Why did my yoghurt burst?
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Why did my yoghurt burst?
Ok i flew over this morning from LHR to ZUR had a .5 litre tupperware container 75% full of greek yoghurt had one of those lids with 4 clips one each side.
I squeezed the container as i sealed the lid to keep air almost vacume state.
I put it in my suit case, but when i arrived i found hmm quite a bit had leaked from the corner. On inspection the container seems ok?
This was on an A320 so im guessing pressurised hold? Can anyone explain why it might of expanded out of the container?
Thanks!
I squeezed the container as i sealed the lid to keep air almost vacume state.
I put it in my suit case, but when i arrived i found hmm quite a bit had leaked from the corner. On inspection the container seems ok?
This was on an A320 so im guessing pressurised hold? Can anyone explain why it might of expanded out of the container?
Thanks!
Paxing All Over The World
Lucky it was only a short haul. If the Yog had a live culture, who knows how much it would have grown by the time you reached Sydney ...
Welcome aboard the fabulous cabin of PPRuNe, McKenster.
The air pressue in the whole aircraft drops to be the equivalent of about 6,000 ft above sea-level so the pressure in the tub is now much higher than outside. As in all other areas of the planet, nature tries to equalise the pressure.
Welcome aboard the fabulous cabin of PPRuNe, McKenster.
The air pressue in the whole aircraft drops to be the equivalent of about 6,000 ft above sea-level so the pressure in the tub is now much higher than outside. As in all other areas of the planet, nature tries to equalise the pressure.
Paxing All Over The World
I am reminded of the occaision that I packed a roll-on deodorant at sea level and opened it in JNB (= 5,500 asl).
The item was nearly empty and so a fair amount of space inside it with air pressure at sea level. When I unscrewed the top - the roller ball shot out of the base like a ping pong ball, driping a trail of white gloop as it went - all over my suitcase. And - Yes - it did look exactly like what you are thinking ...
The stain is still there some five years later.
The item was nearly empty and so a fair amount of space inside it with air pressure at sea level. When I unscrewed the top - the roller ball shot out of the base like a ping pong ball, driping a trail of white gloop as it went - all over my suitcase. And - Yes - it did look exactly like what you are thinking ...
The stain is still there some five years later.
The item was nearly empty and so a fair amount of space inside it with air pressure at sea level. When I unscrewed the top - the roller ball shot out of the base like a ping pong ball
For the OP
a .5 litre tupperware container 75% full .......
). Always minimise the amount of air you "pack" an airtight container....
I tried explaining the pressure thing to some girls who found their shampoo had oozed everywhere in their suitcases.They were blaming rough baggage handling in a minibus and abusing a tour guide.
Waste of time
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Ah yes. The problem is it's Greek yoghurt.
If it was British yoghurt, it would have been suitably restrained.
It's a culture thing...
If it was British yoghurt, it would have been suitably restrained.
It's a culture thing...
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if you want to transport it again you need to vacuum pack and seal it into a food vacuum bag then heat seal it then put it in the box and leave the lid slightly off.
This was discovered by myself while transporting cow poo samples. The beefing up of the box can work but it then becomes brut force and weight over science. You just need to get rid of the gas so there is no expansion.
You can pick the bags and heat sealer up off the place called a river for 20 quid. And actually they are pretty good for using in the kitchen anyway soup is good as you can just chuck the bag in the microwave soften it up then put it in a bowl to complete the heating.
This was discovered by myself while transporting cow poo samples. The beefing up of the box can work but it then becomes brut force and weight over science. You just need to get rid of the gas so there is no expansion.
You can pick the bags and heat sealer up off the place called a river for 20 quid. And actually they are pretty good for using in the kitchen anyway soup is good as you can just chuck the bag in the microwave soften it up then put it in a bowl to complete the heating.
Last edited by mad_jock; 13th Nov 2013 at 19:54.
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Thankyou
Thanks pruners for the fascinating detail and musing quips 
Lesson learnt for sure! I mean i was aware of expansion but not by that much. Also schoolboy error leaving the container on it's side in my case.
Often wondered why i see crumpled water bottles leaving my weekly flight, theres me thinking the passengers are being thoughtful about their waste
Lesson learnt for sure! I mean i was aware of expansion but not by that much. Also schoolboy error leaving the container on it's side in my case.
Often wondered why i see crumpled water bottles leaving my weekly flight, theres me thinking the passengers are being thoughtful about their waste
Time was when Lufthansa served apple juice in small (100cc?) cup-shaped containers with a tabbed foil lid. They were more or less impossible to open at altitude without the contents going everywhere, but I suppose it educated the pax in the process.
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Ah, KLM had those containers for their OJ. I discover that they could be opened by using a thumb nail to break the seal on the opposite side from the tab, just a very small hole. Once the pressure was released it was easy to open without making a mess.
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Same problem with the small plastic pots (jiggers?) of milk, or even worse the plastic tubes of milk, which are supplied with tea and coffee onboard. Never a flight goes by without someone in my row splashing themselves with milk. I've learned my lesson and take tea or coffee black on planes now.
I always look to see if the foil lid is bulging outward indicating a higher pressure inside the container than ambient.If so,I peel back the lid very very slowly.
(I was going to say "Prick with a fork", but there's this...Don?t ask me??(about annoying the copywriter) | You Must Be From Away)
Last edited by RevMan2; 14th Nov 2013 at 10:48.