How many of you re-use glass jars or use canning jars to bring your juice or smoothies to work with you? I definitely do, and It’s really annoying to unscrew the lid and deal with the 2-pieces of metal every time I want to take a sip. Enter Cuppow, one of the simplest yet coolest products I’ve seen in a while. The BPA-free sippy-cup style insert fits right where the flat metal lid seal typically would, turning your jar into a convenient portable beverage container. Check it out here!