This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 冺 is uncertain. It visually combines 冫 (ice) and 民 (people), but the original semantic and phonetic roles are unclear.
With no clear meaning, picture ice (冫) covering people (民), perhaps suggesting something frozen or still, but treat this as a visual placeholder only.
For ビン, imagine a bin of ice (冫) where people (民) store things: bin -> ビン.