What word do we use to say that something is so easily available or commonly prevalent?

If I have to say that:

"potatoes are so commonly available in that place that every random shop you visit has a store of them as if its their staple food."

Or if I have to say:

"it is so cold over there that rum is so easily available or commonly seen or prevalent everywhere inorder to withstand the cold."

Is there any single word or phrase or a better way to convey that something is very commonly available or seen almost everywhere or easily prevailing ?

Ubiquitous:

adjective

present, or seeming to be present, everywhere at the same time; omnipresent

Commonplace seems a good fit.

commonplace adjective

​ happening often or often seen or experienced and so not considered to be special:

Electric cars are increasingly commonplace.

[CED]

synonyms include widespread, prevalent [Thesaurus.com]