For 2018 Felt has redesigned the IA's CALpac integrated bento box. The CALpac 2.0 mounts directly to your IA's top tube, and has a simple rubber cover to contain your nutrition items. The cover itself mounts directly to the lower container- preventing any chance of separation.
Weight: 140grams including hardware.
Tri Town shipped out the Calpac the same day I ordered it! This version is a huge improvement over the original- highly recommend it to anyone who has the original Felt IA.