Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: Does it need to be hung up to work?
Document: This functions as designed. I bought this so I could shower outside on my back deck after my afternoon work outs. I also got it so if I ever need it on deployments when I haven't the option of a traditional shower. This shower will allow you a good two solid showers with soap and shampoo before refilling, which is nice. Keep in mind, it's a bit heavy. This is no fault of the design.
However, this stopped when I hung it (vertically, obviously) from my shower tent. Not a big deal for me, might be for some, depending on what is an easier way for you to fill it.
I put in 4 gallons and hung it on a tree branch above my head- my first day out in the wild, and the strap came unbuckled because the nylon strap is so thin and cheaply made , it doesnt hold, and this is a basic camping strap and clasp.
No need to use the propane water heater for a quick shower anymore. The pressure is good and the water gets really warm. Love outdoor showers.
I usaully go by reviews myself before buying certain products and this was tried and rated the best by other purchasers in durability and also amount of water it holds so i'm happy with it IF i need it!
Good price and good quality.Water warmed to 120 degrees F in three hours of full sun. Recommended to anyone with an isolated need for warm bathing water.
Great thing to have, especially if you have ever lived through anything like Hurricane Katrina like I had to. It's better to own this and not use it than need it and not have it. By day 4 after Hurricane Katrina I would have given a hundred dollars for one of these.
The shower work fine and was refreshing on a seven day rafting trip in a wilderness.
It's the better part of 40 lbs. full. Also, being so large, it requires being hung rather high. Again, I anticipated this, so I constructed an 8 foot high post of scrap wood in order to hang it high. You may not have this option. On the plus side the shower is well constructed, and certainly gets warm enough on a sunny day to keep you from getting cold while in the open air.
After many years the nozzle loosened up enough that it will also open itself if hanging, just from water pressure, but not always.The black plastic hollow tube for the hanging function bent into a deep U permanently, the first time I hung it in strong sunlight. This stretched the edges of the bag itself and started the tearing at the edges. I replaced this plastic tube with a 7/8" diameter wooden dowel and attached ropes to that.
Answer: yes