We know there's some saturation in the "plastic bag substitute" market lately, but our order of Tbags just arrived and they're too cute not to share.
A riff on the "I love NY" logo, Tbags are made from irregular tshirts so not only does using them decrease the number of plastic bags in circulation, it puts otherwise orphaned tshirts to good use. Tbags are about the size and weight of a regular tshirt which really isn't much to tuck away in your purse or bag for trips to the market. Their handles are short enough that your older kids will be able to carry them easily. And If you get gunk on yours - throw it in with the laundry, no problem.
They're stretchy, can hold about 15 lbs. and fold up into their inner pocket (made from the shirt sleeve). Finally, they're only ten bucks.
Find them at TbagNYC.com.