Do You Cross-Border Shop for Food?

I’m currently looking for information on Canadians’ thoughts on US food prices. If you live in a border town do you cross to the States to buy your groceries? Not liquor or specialty items – flavours and products that aren’t available on either side of the border – but staple groceries. I’m especially interested if you know of the price difference between the exact same product, especially ones that are manufactured in Canada. Please comment if you’d like to share your stories or opinions on food price differences.