Hi There, I bought a Spidi Hydroback Sport drinks pouch ( £24,99) and 'sport straw' (£17.98) (delivered to a UK address) as I’m riding & racing in Thailand which can be quite hot at times…. I haven’t yet been able to use it, mainly due to work getting in the way and secondly, I haven’t quite figured out how it ‘works’. I’ve attached photos of all the parts that I received. As you can see the ‘sport straw’ is simply an open tube with black cap. I first thought that the black cap had small holes in the end, but it was in fact solid and not perforated. I think that if the 'sport straw' is simply an open ended tube, all the drink will come out when riding. Please can you help me by explaining how it is meant to work, and also if you have any tips for mounting straw on ( or through) the helmet. Thanks & Hope you can help.