The few remaining items get jealously used to stuff my dry bag to make a pillow with nothing to spare. As I speculated the hot soft bottle lost a lot more of its heat during the cold night when compared to my many tests in a cold winter bedroom (as described above).

This seemed to be quite a small value, to give such comfort when compared with the typical heating power of a resting human body of 100 Watts. When I worked for a living, I had the experience of some visiting defence Boffins who came to look at some of my samples of liquid that was sealed in heat-sealed sachet from my machines. Keep in mind that anyone can view public collections - they may also appear in recommendations and other places.My partner thought it was alot of money for a hot water bottle with cover, however i explained to him how it is worth every penny. The folded side of the liner was fed down into the cover and the soft bottle was place within the liner. Place so the right sides face each other, then sew up the side edges and an inch in from each corner on the bottom edge with a fractionally wider seam allowance. Using a specific heat value of water (4,182 Joule/Kg/K), I calculated the heating power of 2kg of water at 100C as it cools to 50C over 8 hours is only about 5 Watts.

On the bright side, this probably improves the soft bottles heating power from 5 to 7 watts per fill. With this hotter start, the soft bottle had noticeably more residual warmth in the morning after 8 hours. All the soft bottles that I have purchased have been ‘cheap’ ones and they all are of wonderful quality so you should stay dry. Here is a little video of the wooden oil wicks burning in a KISS tent stove that would normally burn sticks for fuel. This month the theme is Warm so my hot water bottle carrier upcycled from an old blanket is a perfect contribution.We will notify you once we have received and inspected your item, then let you know if the refund was approved or not. The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network. Slow leakage is the norm unless provoked by rather excessive pressure of supporting the weight of an adult person. However, it would be difficult to heat them while snow camping and would you want them in your sleeping bag? Each digital gift card contains a unique code the lucky recipient can redeem upon checkout when they’re ready.

As a result of the higher temperature, the device provided optimum warmth for an estimated 8-9 hours under moderate conditions.

I am currently up to 50 overnight uses and a tiny leak has developed just as that target count was reached so, I will declare it a non-failure. I later found that I could squeeze in the full 2 L of boiling water, and this has become my standard nightly test condition, as I probe to find if the poor thing has a breaking point.

I have designed my KISS tiny tent stoves to produce intense radiant heat to directly heat cooking pots and to directly warm campers’ bodies.The idea of the liner was to reduce the surface temperature of the cover when the soft bottle has been freshly filled with boiling water.