K.L.
Hi J.! I second the advice to wash them in hot soapy water with a bottle brush that you use only for that purpose. The instructions generally have you boil to sterilize once initially and then after that hand washing is good enough. I never sterilized my baby's bottles after that and she is fine. I assume that is a major reason for wanting to use the dishwasher...
Also, I don't know about bottle covers but I do know that once they start holding them (which probably won't be as soon as you think-and they are immobile for long enough that it shouldn't be an issue for a while PLUS you never want to send them to bed with a bottle anyway so basically, this will be a supervised endeavor for quite a while) you can switch to Born Free bottles and sippy cups. Also, there is a great little stainless steel sippy with handles called Foogoo.
I like glass bottles, if you are pumping breast milk, the small evenflow bottles were the same size and screwed into the Ameda Purely Yours Breast Pumps perfectly--so I threw out the plastic collector bottles they came in. As far as freezing breast milk-they have special bags for that and thawing them and running them under warm water for a minute works just fine.
ONE MORE THING: The glass bottles I bought came with latex nipples, I threw those out and got silicone. They sell the corresponding nipples right above the bottles. Dr. Brown also has glass bottles--but stay away from their plastic.
Blessings, Katie