I have had a Flexiflask for about 6 years now, and have used and abused it to the point where its time for a replacement, but have happily poured boiling water into it, and microwaved it to dry it out after trips. I used it on a few occasions to fill with boiled dodgy water at night and then use that for breakfast etc the next day, until better water was reached. Never thought of using it to warm up my sleeping bag

. . . It got dropped on a rock once and I patched it with a patch of sticky tape

, and continued to work fine. On my last trip It started leaking, and I found that the plastic laminate was delaminating so the puncture was leaking between the laminated layers. Recently enquired about getting a new one and discovered they are no longer made, so am interested in reviews & recommendations from you lot on what you use and how it performs. (Nik - If we get some replies on this theme, please split off)