This guide provides clear, step-by-step instructions for patients collecting a 24-hour urine sample at Tan Tock Seng Hospital. It explains the complete collection process from discarding the first morning urine and recording the start time, to collecting all subsequent urine over 24 hours using the provided kidney dish. The material includes important storage instructions, safety warnings about the preservative liquid in the collection bottle, and emphasizes following procedures carefully for accurate test results.