I've had the sticky plunger happen to me when my work aeropress was sat unused for a few months. I thought it was the sunshine/UV degrading the rubber and didn'

I've had the sticky plunger happen to me when my work aeropress was sat unused for a few months. I thought it was the sunshine/UV degrading the rubber and didn't really think about whether it puts contaminants into the coffee - I just bought a replacement rubber bung for it (they do wear out over a few years usage as well). Edit: Just looked it up and the plunger is made out of thermoplastic elastomer (food grade) Edit2: Found a discussion about a glass aeropress and there would be a couple of drawbacks. Firstly, the glass would likely need to be pre-warmed due to the increased heat capacity. Secondly and more importantly, glass wouldn't be strong enough to survive daily usage and I know I've certainly dropped my aeropress onto the floor enough times to know that indestructible plastic is definitely better for me.