Made it to M*care and back unscathed (snotty baby and tired toddler in tow) and bought the tommee tippee bottles to try the late night top up feed with my EBM tonight...
But while I was there I saw a weird looking 'cup' feeder that had a large tube shape with a silicone valve and an open square-ish 'cup' bit on the end. Can't for the life of me remember who it was made by but does anyone use it?