A streak of 10 cups will upgrade to a level 2 chest, and a 20 cup streak to level 3. The rewards are as follows:

Level Min 💰 Min 💎 Chest Parts
1 4500 2 Common (at least 18 common and 2 rare parts)
2 5625 4 Uncommon (at least 29 common 2 rare parts)
3 6750 6 Rare (at least 45 common and 6 rare parts)

For more info on likely parts see chests info

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