Dressing food with oil and vinegar can be problematic, with their differing viscosities often leading to too much or too little of each being dispensed. The innovative design of these flasks eliminates this problem, by allowing the flow to be finely adjusted whilst pouring. Simply depress the large button on each cap to control the flow as you pour – press more or less as required. Their ergonomic design is intuitive to hold and easy to clean, and they come with their own silicone coaster for smart, organised storage. Dishwasher safe.