Tommee tippee hard spout and handles cup. Tum tum or melii Abacus straw cups. Any 360 rim cups. Straw cups without valves are recommended but for occasional/no spill use the 360 or straw with valves is fine.
Tum tum weighted straw cup is the best for us. The water doesn’t spill whilst he shots it about x
We use a tum tum weighted straw cup. Took a few days for my little boy to learn how to use it but it seems to work well and he can be left with it without too much spill!