To enjoy an excellent variant to its drinks and once on the balcony or in the open, without fear of wasps or other animals. It should, however, programs are used, which can be a little space between the opening. Straws that pass are just result in negative pressure and cause the liquid come out even after weaning on the straw like a fountain. It should be used only straws that are in force, as supplied. Price would of course be desirable to adapt, but the company also makes for damaged goods delivered immediately replacement. A very kulantes companies. Use value and corporate management, a unique good!