In my local grocery there's a brand of apple cider - can't remember the name - which comes in a 3-quart glass jug. That's a perfect size for most of my starters. Or, get a gallon jug of cheap red wine, pour it into a big ol' beef stew, and use the jug for a 3-quart starter. Sanitize everything, of course. I use 3 ounces of DME per quart, which gives the starter an OG of about 1.033 which is perfect. Heat to a boil for a few minutes, cool and pitch. cover with sanitized foil and give it a swirl every few hours, or whenever you think of it. Do this 2 to 3 days before brew day. On brewday morning, stick it in the fridge; when ready, decant, swirl and pitch. Easy peasy!
Cheers,