The spray tops are intended to fit many different sized bottles therefore the tube is designed to be cut to length to fit your desired bottle. We recommend cutting at an angle and that the tube fits to the bottom of your bottle to maximise on it’s contents.
This can very occasionally happen as the steel balls that are manufactured to insert into the top of the housing, during their machined process, can differ in size by the minutest measurement but within manufacturing tolerances which can result in the occasional ball falling out. This is rare but we are happy to forward replacement roller ball tops within 6 months of the purchase of your goods. Please just get in touch and tell us your order reference number and we will happily rectify this for you.
You are correct in that some essential oils contain natural chemical constituents that have the ability to break down certain types of plastics which can them leach into your water and be drank and could cause leakage if the plastic seals are broken down. For this reason we recommend a glass or metal drinks container (like the ones that we have available) in all instances for your reassurance and satisfaction.