The mitzvah of mishloach manos (giving two portions) is fulfilled by giving two types of food (even if they are the same bracha) to one individual. Water or seltzer are not considered a portion of food. A sandwich (even if it contains bread and meat) is considered one portion.
It is preferable that the portions should be considered respectable portions and not insignificant (i.e. one candy).
Although many have a commendable practice to give mishloach manos to many people in order to foster friendship, it is only necessary to give one person in a fashion that fulfills the above requirements. All the additional mishloach manos can be fulfilled with simpler portions.
Halachos pertaining to Matanos L'evyonim
The minimum amount necessary to fulfill this mitzvah l’chatchila is to give two aniyim sufficient funds to purchase a seuda of bread and meat. This amount should not be given from maaser funds, though one may add to this amount from maaser funds. The Rambam writes that one who is able is encouraged to increase in giving matanos l’evyonim more than mishloach manos, as the greatest way to celebrate is to gladden the hearts of those in need.
One can fulfill this mitzvah through the SSCM Fund.
Important Numbers
