I use a wine bottle for my "Rolling Pin". Don't do a lot of baking, so it's more than sufficient. I fill it 75-80% of the way with water and freeze it when making crusts for pie to keep the butter cold (I cork the end of it). Works for me anyways...
I'm also a post-it note fanatic. I keep one on the fridge for recording things I run out of. It's a self-generating grocery list for staples.
I also love those Ziploc containers. I must have 50-60 various ones in one of my cupboards neatly stacked. I like the ones with the screw-top lids, as both sizes use the same lid. Use them for freezing stocks/sauces, leftovers in the 'fridge, and even to bring bowls of cereal to work with me.
Stainless steel cups are another of my favorites. I use them as prep cups, to hold leftovers (covered with wrap/foil), and they're oven safe so I can warm up lots of things in the oven when I have it on. They're great for steaming in waterbaths too.
My 8" Chef's Knife. I'd be lost without it. Use it for almost everything!