Insualted Hydration Tube

Ive been using the cranktank on all my bikepacking adventures since 2021. For me, i find it the perfect solution for carrying water whilst letting me run a 1/2 frame bag. Whenever I do multi day events, I always get comments ranging from 'what is that' through to 'what a brilliant idea, where can I get one' . For multi day events or, when water supplies are scarce, its my go to.....