I've seen even cheaper thing on a machinery that shouldn't be tipped over - a liquid in a U shaped open ended plastic pipe on a sticker. Tip it over too much, t

I've seen even cheaper thing on a machinery that shouldn't be tipped over - a liquid in a U shaped open ended plastic pipe on a sticker. Tip it over too much, the (coloured) liquid spills out onto the package and tells the recipient to refuse the package.