For narrower-diameter bottles (16 ounce) placed in standard bottle cages, neoprene sleeves seem to work well.
My problem is with the 24 ounce bottles that are slightly larger in diameter than the decades-old "standard" water bottle diameter. I have a couple cages that I've "creatively adjusted" to fit these bottles, but the added weight + fatigue vulnerability from the "adjustments" has resulted in a few failures. I've discovered some plastic cages such as the older Trek and Specialized ones will bend/stretch to accommodate fatter bottles, but have a tendency to gradually eject empty bottles, as happened to me last Saturday on a ride. The plastic Zefal cages seem to be happy with fat bottles, along with the "universal ones" using an adjustable strap for confinement, but the strap-type ones don't work well for easy/fast access.