January 23, 2010
Click here to see CATSA's list of permitted and
Canadian Air Transport Security Authority
Restrictions on Liquids, Gels and Aerosols
The following security measures are in place until further notice: Passengers are permitted to bring liquids, gels and aerosols through security screening at Canadian airports provided that the items are packaged in containers with a capacity of 100 ml / 100 grams (3.4 oz) or less, and that the containers fit comfortably in one clear, closed and resealable plastic bag with a capacity of no more than 1 litre (1 quart). The approximate dimensions of a one litre/quart bag are 15.24 cm by 22.86 cm (6 in. by 9 in.) or 20 cm by 17.5 cm (8 in. by 7 in.). One bag per passenger is permitted. 
Baby formula, baby food, milk, water and juice when passengers are travelling with a child aged two years and under, liquid prescription medicine and essential non-prescription liquid medicines, are exempt from the container size restrictions and are not required to be placed in a plastic bag. However, passengers must declare all such items not in a bag or over 100 ml / 100 grams (3.4 oz) in capacity to screening authorities. These passengers may be subject to additional screening. In order to minimize potential delays at the screening point, passengers must remove from their carry-on bag, the closed, re-sealable plastic bag containing all permitted liquids, gels, and aerosols and place them directly into the trays provided at the beginning of the screening process. There are no size or bag restrictions for liquids and gels packed in checked baggage. The Canadian Air Transport Security Authority (CATSA) is Canada's aviation security authority. CATSA's primary responsibility is to enhance the security of the travelling public by ensuring that threat items are not carried onto an aircraft.
March 6, 2008 excerpt from:
http://www.catsa-acsta.gc.ca/english/travel_voyage/notice_avis/index.shtml