1. BNTO lid attachment for mason jars: Tweet Fun news, jar lovers! Today, the folks that make the Cuppow have released a new product that I predict will have a giant impact on how we use canning jars to tote meals and snacks. Called the BNTO (a nod to the Japanese bento boxes that served as inspiration), its a 6 ounce cup made (via Food in Jars)