Looking for thermal contigo style mug. But it must have no fiddle-able bits on it (So no little clips or slidey bits ) and nothing that needs to be completely removed and lost to drink from it. And it must be completely reliably non spill.
DS(13) with SN has to have several portions of whole milk through the day, I've found thermal mugs best for out and about but he has a habit of accidently/idlely destroying them then looking horrified at me 
I had the perfect one with screw lid (just unscrew it a little bit to drink) but it fell out my backpack getting on a train and I have no idea the brand (it was a random purchase in a real life shop). I really want another one like that. Hoping mumsnet can help