An unlockable secondary weapon for The Scout from Team Fortress 2. It is a soda flavor produced by the fictional company Bonk!. Upon activation, this item will grant the player with 8 seconds of invulnerability, while forcing them in third-person view and rendering unable to attack, only letting them jump, move and reload weapons. After the effect of the item wears off, the Scout is inflicted with a 5 second debuff, slowing him down by a rate based on how much damaged he absorbed while invincible - starting at 25% at low ranges and 50% if the player receives over 200 damage.

Before the invincibility effect starts, the player is forced into a 1.2 seconds long animation of the Scout drinking the contents of the can, unable to move and/or attack. To use the item again, a player must either wait out the 22 seconds long recharge cooldown or use a Resupply Locker in spawn to instantly refill their items.

The weapon has two colored versions, one for each mercenary team: "Cherry Fission" for RED and "Blutonium Berry" for BLU.
The tagline for the RED team's "Cherry Fission" flavor is "Now with ISOTOPES!", while the tagline for the BLU team's "Blutonium Berry" flavor is "Now with 33% MORE REAL Radiation!".