Powder and granular material: Certain powders and granular materials in your carry-on are limited to a total quantity of 350 ml or less (roughly the size of a soda can). There are no exemptions for baby items or medical reasons.
CATSA encourages all passengers to arrive at their departing airport well in advance of their flight. Many airlines advise passengers to arrive two hours in advance for domestic flights and three hours in advance for US and international flights.