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5-liter cup is already available for the wiper fluid when you take it to the snowplow truck to the right of the school. You need some other way to measure the fluid. The answer is the Dog Dish from Rodrick's room.

To measure exactly 4 liters, fill the dog dish (3 liters) then empty the dog dish into the cup. Fill the dish from the bottle again and there will be 4 liters left unpoured.

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12y ago

What else can I help you with?