This is a paid asset, but now you can download POST-APOCALYPSE ICONS GAME PACK 4 Free.
Detail this asset from Unity Store: Original Link
POST-APOCALYPSE ICONS GAME PACK 4
10 post-apocalypse icons for creating your RPG game. Icons in high resolution 512×512 with transparent background.
PACKAGE INCLUDES:
Soap;
Cup;
Snack;
Butter;
Alcohol;
Leather flask;
Metal flask;
Donated blood;
Fishing line;
Gas-burner.