Learning Resources Liter Measurement Set, which includes four durable, sealable plastic bottles in common real-world shapes. Educational Purpose: Designed for students in Grade 1 and above to visualize volume relationships and learn about liquid capacity, mass, and metric-to-standard conversions. Set Components: Includes four graduated containers with capacities of 2 Liters, 1 Liter, 500 mL, and 250 mL. Key Features: Each bottle features clear markings for both metric and standard measurements and is made from classroom-safe, easy-to-clean plastic. Additional Resources: The kit typically comes with an Activity Guide that includes a conversion chart and hands-on measurement activities.