(4 x 10g Sachets)

well i have an unbreakable thermos flask that my mother bought me when i started work 25 years ago.I now use it when i go fishing and the inside of it was completely black like i used it to store creosote lol no joke it was almost black with stains.i used this stuff and now the inside of this flask is completely clean and like it was new 25 years ago absolutely brilliant stuff dont buy a new thermos use this stuff properly as it says on the back of the packet and it works better than expected. i have tried everything to clean this treasured flask of mine and this is the only stuff that actually does work. highly recommended!!!

I'd left my thermos flask closed for a few months unused, but when I opened it recently it had the most awful smell. It was also quite heavily coated inside with tea stains (despite me swilling it regularly after use). I'd read a few things online and tried them out - soaking it, using bicarb etc, but it was still the same with the tea stains and awful smell. It seemed such a waste to throw it out as it was a good quality flask, and still quite new. I thought I'd give this product a try, and I'm glad I did as I was delighted by the results. I used one of the sachets, filled it with hot water as suggested, and left it soak for about 6 hours. When I opened the flask and emptied the solution out, all the tea stain coating had peeled away from the walls of the flask and was mixed in with the water, leaving the inside of the flask as shiny and as good a condition as new. The bad smell had also gone completely. Thoroughly recommended for giving a flask a new lease of life.

Used them for many years and they always work well thank you.

I used a sachet to clean out our 2 thermal mugs, which are stainless steel inside. I didn't think they were very dirty until I saw how shiny they were after I'd cleaned them! Very easy to use - just add boiling water, and the stains start lifting straight away. Leave it for a while to soak off completely, then rinse. Brilliant - literally!

Works very very well.My steel flask had thick layer of coffee deposits ,on inside ,and difficult to remove. I filled flask with the contents of one sachet and hot water,let it soak for half an hour,then used flask brush (lightly) and the deposits just came loose ,easy as you like.If i had left it to soak for an hour, i probably wouldn`t have needed the brush .Best stuff i have ever tried.

Delivered 4 sachets, only 3 sachets contained any product , too much hassle to return for price, buyers BEWARE , oh works kinda ok ish

Used on steel flasks with little results. Maybe designed for glass thermos ??

I have tried many ways to get rid of the tea stains from my flask,this is the first product to work ,some times though you need to repeat the treatment that is why i have given four not five stars ,