Once you open the bottle, the juice should stay fresh for 10 days and even 3 weeks. As always, it depends as much on the quality of the juice as it is on how you store it. When microorganisms in the air enter the juice container, they begin to ferment the fruit, which changes the taste and aroma of the juice. Juices that are all fruit juices spoil sooner than juices with added sugar and preservatives, since the natural sugars in the fruit will begin to ferment over time.
If you want to extend the shelf life of raw juice by more than 7 days, you will have to perform some type of pasteurization process and the juice will no longer be considered raw. So how long does the juice last? When properly stored, the shelf life of fruit juice after its expiration date is approximately. Using heat pasteurization is better than additives (in my opinion), although the juice will lack some of the nutrients contained in raw juice and should not be labeled as cold pressed. I recently started making juices and would like advice on what to do and what not to do and any recommended juicer or blender that might be good for a new juice company.
You may also notice that a juice has been turned upside down when it doesn't smell good or looks like vinegar, or when the juice is carbonated and the bottle has expanded and seems too full. Frozen and thawed apple juice may not be the tastiest drink on its own, but adding a few cubes of frozen juice to a glass of water on a hot day can work wonders. While it's normal for the juice to settle, meaning that the darker color will separate at the bottom and lighter at the top, it's not normal for the top of the juice to be brown. I think that storing juice in stainless steel is very good, since all the tanks in the juice factories are made of stainless steel.
Similar guidelines apply to other juices, such as orange juice (here's how long orange juice lasts), etc. Spinach, kale and celery juice %26 Apple juice for two nights in the fridge filled to the top with added lemon so that they can be kept longer. Juice made with any other technology, such as a chewing “slow squeezer”, an auger squeezer, or a centrifugal juicer, will give you a thick, frothy juice that separates quickly and turns brown. Only an authentic juice squeezer, such as a Goodnature juicer, will provide you with that smooth, consistent juice that will last several days.
Many times, when people complain that their juice separates quickly or takes on strange colors, it's because they don't use a real juice squeezer.