Items & Inventory Beginner

Backpack and Items

How backpack slots, upgrades, item types, and multi-use items work - and why some copies can't be used or sold. Backpacks start at 20 slots and can grow to 2500.

Updated Sep 9, 2026 196 views

Your Backpack holds every item you buy, win, cook, find, or trade for. It has limited space, so knowing how slots and item types work saves you coins and headaches.

Where to find it

  • Direct link: /backpack/
  • Sort by newest, name, type, rarity, or quantity, and filter by item type.

Backpack space

  • You start with 20 slots, and every item copy takes one slot - 5 apples use 5 slots.
  • Items listed in your shop do not count against your slots while they are listed.
  • Items you want to keep but not carry can go in a Safety Deposit Box at the Bank. Stored copies leave the backpack completely - no slots used, nobody can see them, and nothing can use or sell them until you take them out again. The box is rented for a fee from your bank balance.
  • A full backpack blocks purchases and reward claims, so keep a few slots free before opening prize wheels or collecting expedition loot.
  • Upgrade from the backpack page: each upgrade adds 10 slots. The first costs 500 MPC and each one after costs 250 MPC more than the last (500, 750, 1,000, ...), up to a maximum of 2,500 slots.
  • Two more ways to grow it: Backpack Expansion items used from the backpack - Flamepack (+3), Backpack Expansion Kit (+5), Galaxibag (+6) and Mirobag (+8) slots each, see Item Effects - and the level-up rewards you claim on your Dashboard at player levels 10, 25, 50, 75 and 100 (+2, +3, +5, +5 and +10 slots).
  • 2,500 slots is the ceiling however you get there. Coin upgrades and expansion items both stop at the cap, and an expansion item that would overshoot it only adds the slots that fit. Neither VIP nor anything else raises it.

Item types

Items come in these types: food, toys, books, medicine, potions, battle items, tickets, upgrades, vials, accessories, evolution items, nests, and collectibles. Food, toys, medicine, and books are used on a pet; potions and upgrades usually act on your account (coin boosts, extra game plays, resets, unlocks); battle items equip in the Pet Arena; collectibles exist to be collected, displayed, or sold. See Item Effects for what each effect does.

Using items

  • Pet items open a picker so you choose which pet to feed, play with, heal, or read to.
  • Account items (boosts, resets, unlocks) activate directly from the backpack with the Use button.
  • Some items have multiple uses. Each use ticks the counter down; when a copy runs out it disappears and, if you have more copies, the next one starts fresh.
  • A partially used copy cannot be sold, auctioned, or traded - finish it or keep it.
  • A friend's wrapped gift waits at the top of the backpack until you open it - it doesn't take a slot while wrapped, but you need one free slot to unwrap it. See Friends and Mail for sending your own.

Locked and reserved copies

Copies that are listed in your shop, up for auction, or locked in a pending Haggle Hut trade cannot be consumed. If the Use button refuses or a listing form shows fewer copies than you own, that is why - unlist or cancel the trade first. Three features skip the unlisting step for you: the Kitchen can cook shop-listed ingredients, den item requests accept shop-listed donations, and the Queen Bee accepts shop-listed quest items - all simply remove the listing. Trade-locked copies stay off limits everywhere.

Before you sell something

  • The "List in Shop" button shows the item's NPC shop price, its average player-sale price over the last 7 days, and the cheapest current listings, so you never sell blind. Listings priced under the item's market floor (see My Shop) are left out of that comparison, and your own price cannot go below the floor either.
  • Keep food and medicine you will need this week - buying it back always costs more than the sale earned.
  • Check whether an item is a Kitchen ingredient, a quest target, or an arena battle item before letting it go.