This is such a reassuring thread! I used to get really stressed over mealtimes (and knowing that you shouldn't turn mealtimes into stressful events just made my stress worse!) but have now managed to relax about it (although I still have my moments!).
DS (13 months)eats a very small variety of things - rice cakes and philadelphia, grapes, ham (sometimes), sausages, cheese on toast, eggy bread, yoghurt and fromage frais. I can also get the occasional jar of brocoli and sweet potato down him, which is the only vegetables he will even contemplate!! He doesn't use a spoon, except to create a lovely splatter effect on the walls. I found it helped to change my focus to 'has he eaten enough to survive?' and anything else is a bonus. It also helped to think about the amount that he had eaten over a whole week rather than on an individual day or meal basis. Even if they eat virtually nothing during the week (and when you add it all up, you will probably be surprised how much they do actually get in), if they are drinking milk, then that will still be enough to sustain them.
I do try to introduce new things into his diet (and just mentally accept in advance that he probably won't eat it!) but also have something there that I know he has eaten before so that I can tell if he's not eating because he's not hungry and that it's not that he just doesn't like what's presented. I do tend to still offer sweet things (only yogs, fromage fraise and fruit) even if he doesn't eat his savouries as there is still goodness in that stuff and I want him to think that mealtimes are enjoyable.
Anyway, I'm sure I'm not doing things the 'right' way, and still have loads of guilt that I'm not cooking him organic lasagne every night (for him not to eat!), but it's how I manage to cope with it!
He has absolutely wolfed down any chips, crisps, chocolate that have ever been offered to him (only occasionally) - I can see that he takes after his mother!
I too have a large collection of beakers that he won't drink out of - finally found some success with the Kids to Go type, so we're sticking with that. Haven't tried his milk out of it yet though - more guilt about that too!