QTrees - Insulated BottleQTrees Insulated Bottle Stay hydrated with our insulated stainless steel bottle with a bamboo lid and a handy handle. The bottle is perfect for hot summer and cosy cold days, with a filling capacity of 750 ml. We have developed this reusable drinking bottle to put the icing on the cake for our project Quantified Trees (short: QTrees). By the way, the bottle is also great for watering potted and balcony plants, just like ensuring you get enough water