Good cups for babies learning to drink by themselves?

My son just turned one and he refuses to drink anything! He's only been breastfed before (no bottles). We have tried to give him water and milk from different kinds of sippy cups but he refuses to drink from them. I can only get him to drink the tiniest amount if I use a regular glass, but he can't do it on his own, obviously. Do you have any ideas on products that might work? I was thinking about getting a NUK Magic Cup, but someone said they were really hard to drink from.