6 Pack Vertical ID Card Name Tag Badge Holder with Waterproof Type Resealable Zip (Vertical ID, 6 Pcs)

I have this one and just keep one fob in it all the time: https://www.amazon.com/dp/B08Q4L8K62?th=1 It hasn't leaked yet, but I still use a ziploc inside of it. Other folks on reddit have posted using ones like this https://www.amazon.com/Vertical-Badge-Holder-Waterproof-Resealable/dp/B07LB3DYX9 without any problems.