Canadian cups
Canadian cups are units often used in Canada for recipes. One Canadian cup is about 227ml making this unit slightly smaller than the metric cup which is equal to 250 milliliters.
UK Barrels
A UK barrel is 36 imperial gallons (not to be confused with American gallons), about 163.659 liters or 0.163659 cubic meters. It is based on the traditional wine barrel used in the United Kingdom.