Any object that floats in water is less dense than water (boats are a special case; even when made of materials denser than water, they also enclose large amounts of air, which has a very low density). Although the water molecule is small, they pack close together and form a relatively dense fluid. Larger organic molecules are in many cases less dense because they are not as tightly packed. So, in pickles, there is a certain amount of molecules that are less dense than water.
Probably because jars are easy to open and reuse. A can of pickles would seldom be used all at one time.
Vinegar will not react with glass but will react with metal.
A glass container is anything made of glass that is used to contain or store something. For instance, a jar or a bottle made of glass is a glass container.
a ceramic jar or glass
Yes, a glass container can be considered a capital resource. Capital resources are man-made goods that are used to produce other goods and services. A glass container can be utilized in various industries, such as food and beverage, pharmaceuticals, and cosmetics, to store and transport products.
A glass bottle is used as a container for many reagents.
A watch glass is a very shallow, round piece of glass that is curved. It is usually not used as a container, but as a cover for a beaker.
Bottles
Archival box/container.
The pH of jams and pickles are very low and could react with the metal in cans. Glass is less reactive and is generally used for acid foods.
Petri dish
Beaker
A beaker.
I store mine in an airtight container on a shelf in my pantry or in a drawer. As long as it's airtight, it will stay soft. In and airtight container. If it gets hard, put in a plastic bag with a slice of bread. This will help soften it up.