Body part can be easily cut to trim the size and the silicone tail is bendable to fit any water bottles. EASY WASH: The straws are made of special materials and can be washed directly in the dishwasher. Tips: If there is limescale residue in the straw, please wash the straw with a straw brush and put it in the dishwasher. ADJUSTABLE: Our gallon water bottle straws are adjustable. It is 30.5cm length, you can tailor it according to the size of your gallon jug. It is suitable for100ml/2000ml water bottle. A SILICONE BOTTOM: It is a of a silicone bottom. The straw can be closed inside your bottle and can jump out automatically because of the silicone bottom.