About this 3D model

This is a simple cover for a bic lighter. I never knew bic lighters where tapered but they are. This cover fits the exact contours of a standard sized bic lighter. I have printed several of these and a few have become slightly loose even though when putting them on the lighter they where pressure fitted very tightly. I'm printing in PLA. May be some expansion going on based on the environment. Please let me know your results.