His name is Piddle, you can probably guess why.
Ewes don't produce water for their lambs to suckle. Water should always be available and they should still be bottle-feeding on lamb replacement formula. I have never given water from a bottle. The formula will give them the fluid they need until they take to the bucket of water-though I use a dog dish as it seems less intimidating. Depending on how your lambs are doing, at 4 weeks I still have them on 3 bottles a day. And they are getting some fluid from green grass. I would drop the bottle watering (I know it is hard to say no), stick to formula and let them figure it out as it seems they are with feed.