My nails have been chewed to nubs since middle school so this gives me hope.

Rinse the paper filter with hot water first or your cup tastes like wet cardboard, trust me on that one.

Ha, your sister nailed it and I learned the same lesson the hard way. I used to think they were a scam too until I watched my buddy pull one cube out for socks and never touch the rest of his bag the whole trip. Now I pack by category and it saves me from tearing my whole bag apart every single morning.