Genuinely spillproof cup for 2yo to take to bed?

[MegBusset]

DS has started throwing a wobbly when I take his water cup off him at bedtime, even when he's finished drinking and is just chewing the spout, watering his toys and generally titting about with it. So I'd like to get one he can just take to bed with him. He has a Tommee Tippee but left to his own devices would drip water all over the cot with it, so is there such a thing as a non-drip cup whose lid can't be removed by a determined toddler?

The anyway up cups are non spill and I have difficulties getting the lid off them sometimes so a toddler shouldn't manage...

we use an 'anyway up' cup. No fiddly bits to it either. even i still fight with the lids after 18 months of use.

Great, will look those up, thanks

I bought DD an Anyway-Up cup yesterday and was expecting it to be more expensive, but it was only 1.99 in Boots. She seemed rather fed up to start with as she enjoys sprinkling drinks all over the carpets and toys too, but they do seem to work!

Well I've just ordered one from Amazon, so hopefully it'll do the trick!