From the Super Mario Wiki
Ultrasyrup Jars are helpful consumables in the Mario & Luigi series. When consumed, they restore a certain amount of Bros. Points (depending on the game) to their consumer. They are usable both during and outside of a fight.
Mario & Luigi series
Mario & Luigi: Superstar Saga
In Mario & Luigi: Superstar Saga, Ultrasyrup Jars (called Ultra Syrups in this game) recover 100 Bros. Points to one person when swallowed. They are sold at the Castle Town Item Shop after Princess Peach is kidnapped for eighty coins. Birdo has a 100% chance of dropping an Ultrasyrup Jar upon being defeated, Magikoopas have a 22.58% chance, ????'s Sharkbone variants have a 16.13% chance, and Sniper Bills have a 12.9% chance.
Mario & Luigi: Bowser's Inside Story
In Mario & Luigi: Bowser's Inside Story, Supersyrup Jars recover thirty Special Points (equivalent to Superstar Saga's Bros Points) when one is swallowed. A couple of enemies have chance of leaving behind an Ultrasyrup Jar after a battle: Dark Trashures and Magifoofas both have a 10% chance.
Mario & Luigi: Dream Team
In Mario & Luigi: Dream Team, Ultrasyrup Jars have the same function as in Mario & Luigi: Superstar Saga, though they now restore sixty Bros. points when consumed. They can be bought from item shops after their inventory is updated for the second time for 180 coins. A few enemies have chance of dropping a Supersyrup Jar after winning against them, including Bloopurns and Lob-omb Rs with a 5% chance, Flaming Antasmatons with a 4% chance, Beehosses with a 3% chance, and Cocoknight Rs with a 1% chance.
Mario & Luigi: Paper Jam
Ultrasyrup Jars return in Mario and Luigi: Paper Jam.
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