Why do airports disallow any liquids in a greater volume than 3 oz. ? Why 3 oz.?

Question

Why do airports disallow any liquids in a greater volume than 3 oz. ? Why 3 oz.?

Answer 1

i dont know i hate it to

Answer 2

I was told that it was because of bomb fluids.  There is no fluid 3 oz. and under that can cause a big explosion.

Answer 3

i think it really isnt the size so much but people were found with bomb fluid in shampoo and other stuff  

Answer 4

It's ridiculous, isn't it?  You can carry on knitting needles, cigar cutters, plastic butter knives, personal lubricants, blunt tipped metal scissors under 4", and umbrellas but no liquids over 3 oz!

Answer 5

Apparently, they assume that 3 oz of a liquid explosive will not create a large enough explosion to be overly worried about.