Keep your drinks refreshingly cold for up to 12 hours with this 20 oz premium stainless steel shaker. Perfect for protein shakes, cocktails, or any beverage that benefits from a vigorous mix, this shaker comes complete with a 1 oz jigger cap and a secure, spill-proof lid. This shaker is free from BPA, BPS, phthalates, and PVC, and is safe for use in the fridge, freezer, and even with boiling water.