Pack Of Gween Soda

Six cans of Gween Soda held together by six-pack rings make up this Large Item, which the wiki says arrived with the Archives Update and can be found in The Stairwell. The one use listed for it is cash: a Depot buys it for 25 Gold. Its page is still marked as a stub, and the picture on the infobox is captioned as not being the real icon, but a concept render.

A trail of small clues

The entry notes that the pack was barely visible in the Admin Panel in devlog 64, and the gallery holds a single in-game view of it. The floor's own sound list includes a Soda Can drop, which suggests the cans are part of the setting, though the page does not tie them to this item directly.

Carrying and selling

Like every large item, the pack takes both hands, which prevents switching hotbar items until it is dropped. A Shopping Cart gives some relief by letting the player carry a limited number of large items to the Depot. Large items can also be put in the Rift or a suitcase.

Achievement

It belongs to the Storage Wars achievement, A thousand is the best I can do, which asks for 1000+ Gold in a single Depot deposit.