Ready yourself for an explosive final level with this limited-edition Final Boss Sour Collector’s Box! Now’s the time to fuel up with our Formula 2.0, surpass those rookie Levels 1 and 2 and reach the next level of sour with the help of the...
Reviews
4.8
36 ratings
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I’m old enough to know I shouldn’t let a drink tell me what level I am…
Apparently I’m Level 3 Sour now.
The Final Boss Sour Collector’s Box absolutely understood the assignment. The Sour Shirley Temple flavor is crisp, refreshing, and has just the right sour punch to make you question your life choices—in the best possible way. (G FUEL)
My backlog is undefeated.
My wallet is at 1 HP.
But at least I unlocked the Final Boss.
⭐⭐⭐⭐⭐
Julius · 4 days ago
Nice combo!
Both the drink and the gummies have a nice sour flavor without overpowering the actual fruit flavor. The caffeine does a good job of energizing me without feeling super jittery
H
Harrison · June 30, 2026
Great Flavor, but NOT SOUR
I was so stoked that GFUEL and Final Boss Sour collaborated to get us a Sour Cherry flavor!
I was so disappointed to taste the candies that came with the Collector’s Box and they were not sour at all. Either there was no sour on the cherries (which were tasty, but not sour.) or the LEVEL 3 sourness was a blatant lie! The GFUEL itself was good, but (once again) not sour.
Cup looks good in the collection, though.