I'd suggest smaller, full, bottles for storing the mixed stock-developer, as it should then last well when undisturbed. If you use D76 or ID11 and want a good sharp result from the Delta films try using it at 1:3 dilution, with the appropriate time change from the Ilford sheet. The extra dilution will minimise the solvent effect of the 'fine-grain' developer as that isn't really so useful with the genuinely fine-grained (or flat-grained at least) Delta films. Nice to read through the Delta-film pdf's from the Ilford site too.

