Vial

Vial is a free-to-play item on the OSRS Grand Exchange in the skilling category.

In-game examine text: "An empty glass vial."

It has a Grand Exchange buy limit of 13,000 every four hours, a high alchemy value of 1 gp, and item ID 229.

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Vial currently has a flip margin of +0 gp, which isn't profitable to flip right now despite 2,423,618 trades over the last 24 hours.

Items with negative or zero margins like this are better watched than actively flipped until the spread widens.