Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: What is the shelf-life of this product/Does it have an expiration date?
Document: Simple and easy to use. These were highly recommended by a friend who was very skilled and knowledgeable in survival. These have a long shelf life and will protect you for nearly all none metal particles.
This product is super great for clearing the water. I recommend it highly. I was so pleased to receive this product so promptly.
Great item for bug out bags, disaster prepping etc.Lightweight and compact.Works exactly as advertised.Very satisfied with this product.
Thankfully have not had to use this product yet, but expect it will do as itis supposed to.Service was quick, arrived on time.Less expensive than some similar products.Would recommend.
This product is exactly as described. I had read the directions wrong and left an incorrect review before. The seller called me and politely notified me that i had read the directions wrong! oops! For everyday creek water it requires just one tablet to purify. Great product, great business practice, great value!
This water-disinfection product is unique. It produces chlorine dioxide, a considerably more powerful germicide than chlorine. (For instance, giardia, which is found wherever ruminants graze, is far more susceptible to chlorine dioxide than chlorine. )It is very difficult to render cloudy water safe to drink, so competing disinfection tablets presume that you have somehow removed the turbidity.
In all honesty, I haven't actually tried this product. The instructions in Hebrew and English are very easy to understand and aren't difficult to follow. What I like most about this product is the individual tablets packaged so that one or more can be cut from the sheet of ten for use in EDC or BOBs. This was part of our Christmas gifts to family members which included water purification in a survival scenerio. I've used Israeli products before (especially those used by the IDF) and have found them to be exceptional.
use for emergency only,
i used them for two months on the gdbr. zero digestive problems. very light weight, almost no volume. tiny tablets somewhat difficult to extract from the packaging envelope.
Whenever I go into the mountains I have a few of these in my pack. I recently came across a woman injured from a fall on a hot summer day. Since her son had already gone for help, I stayed with her.It was almost 100 degrees, so I gave her my water.
Answer: yes