I'm planning to start developing by myself soon. I'm collecting information on all the stuff that I need. I have a question about some plastic elements in the development process. About the following things: Dark plastic bottles, jug to mix the chemicals, funnel. I was planning to buy them on-line in a specialized photography store , but the shipping to Taiwan is quite expensive. Is it possible to use normal plastic ones that I can buy in the store here or, the material of which those products are made is somehow especial? Some kind of plastic to avoid? (never handled this kind of chemicals and I'm not sure how strong/corrosive are) Probably is a stupid question but I found nothing on-line and I'm worried to use cheap plastic products from the store and ruin the chemicals, negatives or the cabinet in where they will be stored.