I work at gyms and seaside too, I mop up messes made by you. Though I get soaked, I never complain, what am I used after bath or rain?

I crinkle, shine, and swish about when rainy clouds come drifting out. You wear me when the raindrops fall, what am I that shields it all?

I stand where boundaries rise and fall, I keep things in and out for all, I’m silent, still, yet strong and tall.

Shake me up and down Give me a squeeze And I squirt.

The mailman delivers me Influencers make me Soldiers can't abandon me