SAFE HEALTHY: The straws are made of 100% food-grade and BPA Free plastic.^ ADJUSTABLE: Our gallon water bottle straws are adjustable. It is 38 cm length, you can tailor it according to the size of your gallon jug. It is suitable for 128oz, 64oz, 1/half Gallon water bottle.^ 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.^ A SILICONE BOTTOM: It is a special design of a silicone bottom. The straw can be closed inside your bottle and can jump out automatically because of the silicone bottom.^ CUSTOMER SERVICE: If you have problem with our product, please simply contact us, we will offer a best solution.^