**Jerry Can:**
The Jerry Can is a robust, rectangular, and portable container designed for the secure storage and transportation of liquids, particularly fuels like gasoline and diesel. Its origins date back to World War II, originally developed by the Germans for military purposes, which is reflected in its durable design. Typically crafted from high-density polyethylene (HDPE) or steel, Jerry Cans boast a capacity of about 20 liters (5 gallons). They are characterized by distinct features such as a wide mouth for easy pouring, airtight sealing cap, and built-in handles that facilitate convenient carrying and pouring. Jerry Cans also incorporate reinforcement ribs to enhance structural integrity and withstand the rigors of transportation and handling, making them popular not only in military contexts but also for civilian uses such as camping, boating, and emergency fuel storage.

**Measuring Jug:**
A measuring jug is an essential kitchen tool specifically designed for accurately measuring liquid and dry ingredients. Typically made from transparent materials such as glass, plastic, or food-grade silicone, these jugs are marked with graduated scales, usually in milliliters, liters, cups, ounces, and pints, ensuring precision in cooking and baking. They come in various capacities, generally ranging from 250 milliliters to 2 liters, adequately accommodating different recipe requirements. Notably, the measuring jug often features a spout for easy pouring and an ergonomic handle for secure grip and control. Its transparency allows for visibility of the contents and measurement lines, facilitating precise and hassle-free culinary preparation, leaving no room for guesswork.

**Funnel:**
A funnel is a simple yet highly functional tool used for channeling liquids or fine-grained substances into containers with small openings, thus preventing spills and waste. Typically conical in shape with a wide mouth that tapers into a narrow stem, funnels are indispensable in both household and industrial settings. They come in various sizes and materials, including plastic, stainless steel, and silicone, tailored to handle different types of materials ranging from cooking oils and liquids to powdered ingredients and automotive fluids. The design of a funnel capitalizes on its basic but effective geometric shape, where gravity aids in the smooth and controlled flow of substances, ensuring precision and cleanliness in tasks such as filling bottles, transferring fuels, or decanting liquids. This makes the funnel a versatile tool that contributes significantly to efficiency and tidiness in various applications.