Stamin-Up is a Perk-a-Cola introduced in the zombie's map Ascension from Call of Duty: Black Ops and Call of Duty: Black Ops Zombies and later appeared in Call of Duty: Black Ops II and Call of Duty: Black Ops III. It increases the player's running speed and sprint duration.

What does Stamin-up do in Cold War?

In Call of Duty: Black Ops Cold War, the perk increases the player's run and sprint speed when not upgraded. When upgraded to Tier 1 the perk increases the player's backpedal speed, while at Tier 2 it gives the player immunity to fall damage.

What does double tap do?

Double Tap, also known as Double Tap Root Beer, is one of the Perk-a-Cola machines featured in the zombie maps of Call of Duty: World at War, Call of Duty: ZOMBIES, Call of Duty: Black Ops, and Call of Duty: Black Ops Zombies. This perk increases fire rate by approximately 30% in all weapons.