Twice the taste, zero calories.
to be honest, you are wrong. you can not fully empty your stomach, so you can not get rid of all the calories.
but... I understand your pain... I... I... i am bulimic too... its really hard for me to admit... because... my family has always told me it was a girls disease... but... its not. Its a human disease.
Other than eating, are there any reasons why you purge? Anxiety? anything. Talk to me if you want, I am here. Once you find out the deeper reason behind why you are purging, its easier to stop.
also, after you purge, drink at least a glass of water, and DO NOT brush your teeth afterwards for at least an hour, otherwise you are brushing the enamel off your teeth with the stomach acid.