Hard spout cups that don't leak?

My toddler drinks out of a normal cup during the day, but still uses a sippy at night for his milk. He's 20 months and nonverbal. Soft spouts, 360 cups, and straw cups are off limits because he will chew through them. I specifically need a hard spout one, but every one I have tried has either leaked from the start or begun leaking after a couple of weeks. I don't have a dishwasher (so it's not an issue of them being destroyed in one.)

Best hard spout cups you've found that don't leak?