I bought 2 little Keychain pill containers from Walgreens for 5 bucks a piece and they work perfectly. One for loaded/fresh caps, one for spent caps. They are metal and have a rubber gasket, so not smelly at all.
Very simple and cheap solution.
What is stopping you from using it?
I don't have the WPA yet, as I ordered it with the capsules.. however, I used the whip and 18mm elbow from my Arizer EQ to use it through my bong. I was pretty impressed by the performance, I was able to take much longer draws without burning my throat. No...
There is definitely a drop down menu with a site map. Make sure you're not double tapping when you click shop and it should take you to a sub menu inside the drop down. That's where you'll find the accessories link.