In general, these are convenient because instead of washing 4 one-liter jars, you only wash 1 jar and finish up faster, especially when you do this job every day, they are handy; just to drink from this, you need both hands, that's the only downside.

Cleaning is easy; it just takes a little practice for about a month to get used to it because at first, you are afraid it might drop or hit and break in the sink.

Also, very useful for making cheese.