The stopper ensures that the condiments do not impart flavor to other foods in the refrigerator. The dressing bottle's drip-proof pour spout ensures dressing ends up dripping on your salad instead of sitting on the table. The dressing bottle's drip-proof pour spout ensures dressing ends up dripping on your salad instead of sitting on the table. The dressing shaker is made of borosilicate glass and can withstand hot and cold liquids. Therefore, it can be used in the microwave, just remember to remove the pour spout. The anti-drip pouring lip is made of stainless steel and silicone, while the stopper is made of silicone only. All parts are dishwasher safe. Add oil and vinegar, shake well and serve. 0.3 liters.