Soft water bottles are great for sticking into jacket pockets for skiing. If you fall on them, they won’t break your ribs. The lower bulk is nice for the movement of skiing, and when empty a soft-side bottle rolls up small.
But it’s a little nerve-wracking when you stuff a soft plastic bladder into your pocket for the first time, unsure if it’s 100 percent watertight, or if you’ll get soaked in a hard fall.