Bought some unbranded E-scooter/MTB mittens for my hardtail couple of years ago, didn't work very well, because wind kept seeping in through the gaps between all the housings and hoses on the flat bar.
This year, I swapped those mittens onto the road bike and the deer ended up upside down. Now he looks like he bombed a drug test and knows it. But it actually works pretty well for keeping my hands warm.
The water bottle is a Rockbros 1.2 Liter insulated stainless bottle, 9.1 cm in diameter. For me, it only fits in the Topeak adjustable bottle cage, and even then I have to stretch it quite a bit. If you need to step off the saddle at an intersection, it gets in the way of your knee when you start pedaling again. It has both a twist nozzle and a flip-straw opening, but the flip straw isn't securely connected to the internal straw, so it leaks when you try to use it. I stuffed a piece of food grade plastic wrap inside the straw section to stop the leak. Mediocre insulation overall, wouldn't recommend.
Temperature where I live is around -10°C to 0°C right now, and it usually drops to about -18°C to -24°C in January
by granttod