The bottom is hollow, so it needs some support, and the whole thing can be printed hollow like an insulated cup. I can't guarantee effective insulation. The siphon has been built into the wall. Consideration was taken to prevent the siphon from beginning when drinking normally. This could only be done by forcing the hump to be in a location that was should never be the lowed part of the rim. That meant adding a handle. Can be scaled down to shot glass size!