They did not mention a specific named type, but they provided the exact sizes for the allowed 1-litre plastic bags along with the required features, from catsa.gc.ca (linked in the official Pearson website):

• Containers of liquids, food and personal items in your carry-on must be 100 ml/100 grams (3.4 oz) or less. All containers must fit in one clear, resealable plastic bag no more than 1-litre in capacity. The bag must be transparent so screening officers can easily see the contents. - See more at: http://www.catsa.gc.ca/liquids-food-personal-items#sthash.fZwNbYKE.dpuf

 
• Each passenger is allowed a single 1-litre bag containing liquids, food and personal items. The approximate dimensions of a 1-litre 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.).

So I guess you can not take any other size, because any other sizes other than the mentioned ones will not make a 1-litre bag. Although I think less that 1-Litre will be fine.

They did not mention a specific named type, but they provided the exact sizes for the allowed 1-litre plastic bags along with the required features, from catsa.gc.ca (linked in the official Pearson website):

• Containers of liquids, food and personal items in your carry-on must be 100 ml/100 grams (3.4 oz) or less. All containers must fit in one clear, resealable plastic bag no more than 1-litre in capacity. The bag must be transparent so screening officers can easily see the contents. - See more at: http://www.catsa.gc.ca/liquids-food-personal-items#sthash.fZwNbYKE.dpuf

• Each passenger is allowed a single 1-litre bag containing liquids, food and personal items. The approximate dimensions of a 1-litre 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.).

So I guess you can not take any other size, because any other sizes other than the mentioned ones will not make a 1-litre bag. Although I think less that 1-Litre will be fine.

They did not mention a specific named type, but they provided the exact sizes for the allowed 1-litre plastic bags along with the required features, from catsa.gc.ca (linked in the official Pearson website):

• Containers of liquids, food and personal items in your carry-on must be 100 ml/100 grams (3.4 oz) or less. All containers must fit in one clear, resealable plastic bag no more than 1-litre in capacity. The bag must be transparent so screening officers can easily see the contents. - See more at: http://www.catsa.gc.ca/liquids-food-personal-items#sthash.fZwNbYKE.dpuf

• Each passenger is allowed a single 1-litre bag containing liquids, food and personal items. The approximate dimensions of a 1-litre 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.).

So I guess you can not take any other size, because any other sizes other than the mentioned ones will not make a 1-litre bag.

They did not mention a specific named type, but they provided the exact sizes for the allowed 1-litre plastic bags along with the required features, from catsa.gc.ca (linked in the official Pearson website):

• Containers of liquids, food and personal items in your carry-on must be 100 ml/100 grams (3.4 oz) or less. All containers must fit in one clear, resealable plastic bag no more than 1-litre in capacity. The bag must be transparent so screening officers can easily see the contents. - See more at: http://www.catsa.gc.ca/liquids-food-personal-items#sthash.fZwNbYKE.dpuf

• Each passenger is allowed a single 1-litre bag containing liquids, food and personal items. The approximate dimensions of a 1-litre 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.).

So I guess you can not take any other size, because any other sizes other than the mentioned ones will not make a 1-litre bag. Although I think less that 1-Litre will be fine.