Just a sharp knife needed to turn an empty plastic shampoo bottle, washing tools, preparation of household chemicals in a number of useful things: a ring with a small eyelet can be used as a suspension bracket to a suitable tool, the lower part with bottom and a flat side wall — like wall-mounted soap dish or a pocket for small items, but the upper part of the conical tank — ready funnel.
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To create moisture reserves at the bottom of flower pots you can put any porous materials: broken bricks, expanded clay. As for control, if there's wet, bring a plastic tube with a foam...
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Among self-defense devices, electroshock units (ESU) are far from the least notable, especially in terms of psychological impact on attackers. They are, however, quite costly, which...