The distinguishing feature in these bottles is the built in delivery tube making it a one piece Wash Bottle. 500ml capacity wash bottle, made of with high quality polyethylene plastic. Translucent, flexible & unbreakable. High chemical durability & moderate heat tolerance. Can withstand temperatures between -50°C and 80°C. Good resistance to acids, alcohols and bases. Features a sturdy, non flexible delivery tube that is integrated into side of bottle. Delivery tube is attached to an inner delivery tube, which reaches the bottom of the bottle.