1. Hauv kev ua haujlwm ntawm cov khoom tiav, saib seb tag nrho cov hlau stainless hip flask yog welded coherently. Don' t xaiv yog tias muaj qhov yuam kev me.
2. Xav hais tias lub qhov ncauj thiab hauv qab ntawm lub taub hau ntswj stainless hlau duav yog lub pob zeb me ntsis. Don' t xaiv yog tias muaj kev tshiav.
3. Ncuav dej me me rau hauv lub taub hau lub tog raj xaib thiab npog lub duav taub hau taub kom pom tseeb tias muaj dej xau.
4. Kawm paub ntau ntxiv txog kev lag luam ntawm cov ntsag duav, xaiv lub chaw tsim khoom lag luam nrog lub koob npe zoo, thiab xyuas seb cov duav puas haum raws li cov qauv kev tu cev hauv tsev.