When reading the CanVape webpage for the SID, I read that "It likes 18650 unprotected batteries and IMR efest's with the label peeled off".
Before I bought my SID, I was back and forth via email with Tom from CanVape. Here are some excerpts from what he shared with me, including details about their battery experiences:
Once I received mine, before doing any peeling, I gently tried fitting one of my (orange) Efest 2000mAh IMR 18650 batteries, and though a little snug, it fit without there being any real trouble getting it back out. The Pepto Bismol coloured Panasonic (I believe) that came with my eVic kit is slightly more snug-fitting, and I needed to shake it a little to get the battery out.
Sorry I can't help much more. Tom's experience differs from mine, so I can't say for sure whether you'll have to do any label peeling, or if the Panasonics will fit or not.