Flu
to not make it rot
They're filled with acid...
Airtight means that something is sealed (or can be sealed) so tightly that not even air can get in or out of the container.
Is it a mixture
Yes, it was the most tightly sealed ghetto of all, perhaps because it was the most productive.
Yes you can as long as they are sealed tightly
stained ceilings from sweat, and also mold and odor.
In a tightly sealed jar about 2 years is the maximum.
Either wrapped in plastic wrap, or in a tightly sealed bowl.
They might explode!
If the container was tightly sealed it is just as good.
The water bottle may be sealed tightly, making it difficult to open.