http://www.tommeetippee.co.uk/product/active_sipper/

of all the 'non spill' cups have bought in the last few years this was the only one that actually did the job and didn't spill! We used them on the last trip we took even though my daughter is past toddlerhood (she was 4 at the time of trip) because of the success we've had with them in the past and they're insulated