EVE Saver

From BioShock Wiki

EVE Saver is a physical tonic that reduces the amount of EVE consumed by Plasmids by 15% when equipped.

• This tonic is only available for the PC and Xbox 360 versions after patch 1.1 and DLC.

[edit] Game Caption

In today's genetic wonderland, you probably feel like there's never enough EVE at hand. With EVE Saver, your EVE will go farther than ever before!

[edit] Location

Available at a Gatherer's Garden vending machine in Arcadia and all following levels.