Buying the Ziggie Crate gives (1200 Energy), if used to fill energy it should only take what it needs to refill and not consume the entire Crate wasting energy.
I kinda wonder if this intentional. You need to make decisions about which tier of food to be buying based on your current energy capacity. For example I decided to use the 200 energy ones even though my cap was about 160 because my laziness was worth the loss of energy to me.
it is intentional but i've been debating whether or not to block off foods until you can auto eat a food at 10% max energy where it consumes the entire food and wastes no energy. thanks for bringing it up Kebb