I also have a couple of the older Podium bottles and love the shape function of those ones but hate the nipple design (gets mold in there and you can take it apart but it’s a pita).
Have an older polar insulated bottle with a regular cheapo bottle nipple. Bottle itself is fine but like those self sealing nipple ones better.
Recently bought a new style podium bottle and like how they updated the nipple to one that is more easily (it seems) to take apart to clean. But the shape is smaller than a standard bottle cage size diameter wise and also harder to squeeze the liquids out by hand compared to the older design. Will not be buying another one of these…wish a replacement top/nipple didn’t cost almost as much as a new bottle either. That one kind of pisses me off.
I think I want to try the newer polar bottle to see if it’s better shape wise to the current Podium bottle shape.