“Ball breathing trainer?” Just call it a cocksucking simulator.
“Your dom/me will love how well you take a gag after a few hours with this!”
What contaminants could be present in silicone? I mean I agree I wouldn't out this in my mouth, but I'm not hearing a BPA style outrage over cheap silicones.
Broke = I only buy BPA-free plastics
Woke = I keep eating silicone to see if anything interesting happens