Dunno - I've bought "chem lab authorised" Nalgene bottles in all sized from 100cc to 2liter, just to have enough. I figure you can never have too many bottles - just like trays - and find the 100cc ones really useful for all those fiddly little solutions. Like Pyrocat-HD, or Silver Nitrate for salt prints.

And mixing the 10g with 100cc water is what you're after, yes.