✅ SOLVED need help on some stamps on the bottom of a aluminum cup

[45 short]

is was found in a area where i have found several civil war items so kind out of place. anyone have any idea what the u.s.p. stands for and the numbers?

 

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[Retired Sarge]

United States Penitentiary (USP) drinking cup?

 

[45 short]

okay that makes sense i guess. thanks Mike.