If you do not have a vial or bottle with a screw cap, and be sure to provide a “blockage guarantee” when transported, for example, acid or antifreeze in the trunk of a car or sunflower oil in a shopping bag, use cord: knotted proposed method, it will securely hold a conventional tube of any vibrations.
Recommend to read
IMPROVED PROBE
Primitive "control print" — electroputere with two wires and the lamp — not the best device for "continuity" of electric circuits. Commercially available testers and isometry is also...
RINGED HANDLE
Simple device — the plastic handle in the form of a groove — protects hands like reducing the weight of his burden. However, the trouble is, it has one unpleasant disadvantage — is often...