“I wonder if I can juice first thing in the morning, and then drink it later?”
This is not a good idea. Vegetable juice is HIGHLY perishable so it’s best to drink all of your juice immediately.
If you’re careful, you can store it for up to 24 hours with only moderate nutritional decline. This is really helpful if you are bringing your juice to work with you so you can consume it during the day.
Put your juice in a glass jar with an airtight lid and fill it to the very top. There should be a minimum amount of air in the jar as the oxygen in air (air is about 20 percent oxygen) will “oxidize” and damage the juice.
Purchase a food vacuum pump like Food Saver with a Ball jar attachment. You can pour your juice into a pint jar and put the lid on and use the Food Saver to suck out the air in the jar to vacuum pack it. This will remove most of the oxygen that will damage the juice.
Immediately store it in the fridge and consume it when you are ready. It is best to drink it as soon as possible and in any case within 24 hours of juicing.
Most people juice in the morning, but if that does not work out well for your schedule, please feel free to choose whatever meal works best for your lifestyle.