A CS2 drop pool is Valve's list of what can drop to players. Since the CS2 launch in September 2023 the weekly drop is a care package you choose from, offering weapon cases, weapon finishes and graffiti from the current pool. Community sites group cases by whether they still drop often, drop rarely or no longer drop at all, and they call those groups the active, rare and discontinued pools. Valve does not use those names itself.
Valve changes the pool in release notes. For example, the 31 March 2025 update added the Ascent, Boreal and Radiant collections to the care package drop list and removed Bank, Italy, Lake and the original Train collection, and the 21 January 2026 update added Harlequin and Achroma while removing Safehouse, Dust 2, 2018 Nuke and 2018 Inferno. Traders watch those notes closely.
How does the drop pool affect case prices?
A case that still drops has steady new supply. When Valve stops dropping it, the only copies left are the ones already in inventories, and every opening removes one. From then on the price depends on how fast people open them versus how many want to hold them.
This is why some traders buy cases that still drop while they are cheap and wait. It can take years for a case to leave the pool, and there is no guarantee any given case will rise.
Where can you see the current drop pool?
Valve does not publish a single page for the drop pool. The changes are spread across release notes, so the community keeps lists based on those notes and on observed drops. Check a recent, dated list before acting, since a case that dropped last month may already have been removed.
Skin collections work the same way as cases. A map collection in the active pool drops its skins in weekly care packages, and when it leaves the pool, the only new supply comes from trade-up contracts using skins that already exist.