Taping the exit port is not as postive as the orange cap and is prone to some fine mess-making.
I’ve tried it :o
Sounds like you have it under control now that you’ve recovered some of those caps.
Store your empties in an air-tight ziplock bag.
I cap the [B]bottom[/B] (of course), tape the [B]vent[/B] and then seal them in a ziplock. Snack size is perfect for one or two carts.
The object is to keep them from drying out.