I carry a Nite Ize Doohickey but it's 90% box tape cutter and 10% bottle opener. Not sharp at all but I haven't tried flying with it. https://www.niteize.com/p

I carry a Nite Ize Doohickey but it's 90% box tape cutter and 10% bottle opener. Not sharp at all but I haven't tried flying with it. https://www.niteize.com/product/DoohicKey-Multi-Tool.asp https://www.niteize.com/product/DoohicKey-Multi-Tool.asp