Pliers are useful especially long nosed pliers.
Even a cheap pair is useful for bending metal or holding small items.
Only expensive pliers will cut metal without blunting.
An inexpensive alternative is to cut a slit in a piece of metal. The photo is a nail flattened and a slot cut with a hacksaw blade.
This tool will help when bending thin wire and thin metal.
leave the flattened nail thicker for bending heavier metel like bottle tops.
A slit cut in heavier metal (even a coin) will help to bend metal like bottle top edges.