My 17 month old has been using the Sippin’ Smart™ ez flow straw sippy / 10 oz for a month now. Before I comment on this cup I would like to say that my daughter has chewed through every sippy cup I have given her or stuck her finger in the silicone slit of the spout and ripped it wide open. She is the true sippy cup durability tester. If a cup thinks it is spill proof, … [Read more...] about Innopbaby Sippin’ Smart™ ez flow straw sippy / 10 oz