Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to foam milk [title] Fill a jam or mason jar with cold milk. [step] Fill the jar with as much milk as you like in your drink. However, since you need room for the milk to expand and foam, do not fill the jar more than halfway with milk.

Ending1: This is so that the milk not only flows, but is also above freezing temperature. [title] Pour the milk and foam mixture into the jar. Ending2: Use your original manufacturer's recipe or just keep the jar of milk on hand. [title] Stick a rubber band into the opening of the jar (you may need to use a pinch knife to keep the rubber band locked into place). Ending3: [substeps] Use 2 percent or non-fat milk since these are easier to froth. [title] Shake the jar for 30 to 60 seconds. Ending4: The cold milk will make it difficult to contain the milk. Instead, use a microwave to fully heat or freeze or place the milk in refrigerator overnight.

Answer format: ending1/ending2/ending3/ending4