"a paper cone" is correct and usable in written English.
It is a noun phrase referring to a conical structure made of paper. Example: We filled the paper cone with a layer of caramel popcorn.
His fatback is fried and served in a paper cone.
Thin, crisp fries arrived in a paper cone.
Steak frites brought tender, meaty hangar steak and fresh, hot fries heaped in a paper cone.
A paper cone is very primitive and we haven't invented a substitute.
There's something very Roman about strolling the streets with a paper cone full of roasted chestnuts.
It's only a few euros for a paper cone loaded with filling olive all'ascolana (stuffed olives, breaded and deep-fried).
Salt and the pepper poured out of a rolled paper cone made a fitting complement to the luxury of oysters and white bread.
Most loudspeakers produce sounds with a vibrating paper cone manipulated by a magnetic field.
Treats include bolacha, as crispy as a waffle cone and 18 inches round, spread with ovos moles, a traditional sweet egg custard sprinkled with cinnamon, then folded into a triangle and placed in a wax paper cone.
The ball, enclosed in a divided pot supported from underneath, or in a sturdy paper cone, is kept moist.
A few summer's ago, when the library had a "Dig Into Reading" theme, Katie hand-rolled a zillion paper cone stalactites and attached them to the ceiling!
