Instruction: Answer the given question using the supporting document.

Input:
Question: who may filters in the box
Document: I find that these charcoal filters need to be changed quarterly, at the most. Of course, your mileage may vary, based on the quality of your water.
I was expecting to see 6 filters in that box......please correct me if there were supposed be four and still costs $36.99.
This is one thing that may seems boring and annoying but is something you have to do in order to keep your Expresso Machine working for a long time
I expected what the picture shows- a box of Breville filters or something similar since it said &#34;brand new, bulk packaging&#34;. Instead we received a bubble mailer with some filters thrown in it. I have no way to know that they are Breville at all.
I have previously ordered this product and it came the the box shown, with the individual filters packaged in &#34;breville&#34; wrappers. This shipment was received in a manilla envelope and the filters were in plastic bags. Not sure if I got the breville product I paid for.
I ordered these filters after going through a previous box. Something has definitely changed. The normal ones are charcoal and you soak them and they are very pliable. These are odd. First, the seal on the box was broken. Second, there is no charcoal in these at all. There are some gold colored crystals that become hard in water. Nothing I would want my water going through. Something is off here - so beware buying from anyone else other than Amazon.
I originally ordered these filters from 718insanedeals, BEWARE these are GENERIC FILTERS being passed off as Breville brand filters. To be fair they did give me a full refund. I reordered these from A`21stCenturyKitchen` and they are the REAL BREVILLE FILTERS. They should be in the Breville box like in the picture, individually wrapped in white packaging with the Breville brand on each filters package. You can tell the generics because they are in a clear unmarked plastic packages.
I absolutely love my Breville single cup coffee maker and I'm fairly religious about changing the filters since I do think good water is important to good coffee. When I put my last filter in the machine I automatically order another box. This time the experience was easy and quick, requiring practically no effort on my part -- so much easier that locating a retail store and making a trip.
I have no doubt about function of water filter. it may work as water purifier.I'm just wondering if I use mineral water from store, should I need still this water filter?I guess using filter may cause less problem inside of piping.lower cost may be more desirable.
It wasn't a br evoke brand but something different. They should not put the box and specify that it is &#34;similar&#34;
Answer: 6 - a one year supply