Aquarius

This enchanted cup holds a honey-like substance that grants various powers. It holds 5 swallows (charges), and regains a number of charges equal to your Charisma modifier (minimum of 1) daily at midnight. 

While attuned to this cup you can use your action to expend any number of charges to drink from the chalice, or give a willing creature within 5 feet of you a drink, imbuing it with one of the following effects.

Beloved of the Sky.

• Gain the ability to polymorph into an eagle and back as an action for the next hour or until your eagle form drops to 0 hit points (2 Charges).
• Polymorph into a Roc until the end of your next turn (4 Charges).
• Cast call lightning (3 Charges).

Pleasure of the Mind.

• Gain advantage on all Intelligence checks for 12 hours (2 Charges).
• Gain 30 feet of Truesight for 2 hours (4 Charges).
• Restores a spell slot (1 Charge per spell level).

Immortal in the Stars.

• You do not age for the next 24 hours (3 Charges).
• Cast plane shift.

Credit for this item goes to Rudok's Tavern, u/Rudocini on Reddit.