I have more SIGG bottles in the house (for sport, for the children ...), but a lighter version that is not as fast as dents get their ALU-sisters has me but then irritated. Today, the bottle arrived. I find them really beautiful and practical. I was not quite sure if the material is fixed or can be dented (as with other brand bottles, which I find very impractical, because then I might as well returnable bottles refilling). Here the material is very stable and keeps its shape when the bottle is empty. I therefore give full star number - my only wish would be a smaller number of 0.5 liter capacity. The format could then bring more to the office or for a stroll around town. For me, the 0.75 liter bottle is then too large to fit into any small handbag. For the sport again, the three-quarter-liter size is ideal.