How much milk can you get in a bottle? We see how 200,000 bottles of milk are put into 1 litre containers in a factory. Milk can be bottled in different sizes of container. A litre bottle is compared with a 20,000 litre tanker.
Students could fill big containers using smaller ones. How many spoons of 5ml will fill a 1 litre bottle? Real life problems could be introduced and solved practically. Students could then compare different sizes of container to find out which ones hold the most and the least.