essellar wrote:
It depends how sensitive you are to staining/colour changes. With most silicone squonk bottles, they'll rotate so finger oils, etc., get more-or-less evenly distributed around the bottle. The topside's bottle-in-a-can sits in one orientation, so everything happens in one spot. That can lead to them being perfectly serviceable but looking a little grungy.
You can spin the bottle if you unscrew the casing.