I had custom trays made out of moulds for my teeth a few years ago and was sent home with lots of syringes of Poladay and Polanight gel to use in them. Worked pretty well and used all the syringes up doing little topups here and there later on. I want to buy more but can't find them anywhere on the internet – does anyone know what might be similar? I'm pretty reluctant to buy just any old gel online as I know some can be really harsh. My dentist's practice has broken up so I can't really ask them... thanks :-)