I am using the cheap first year cups with straws. I replace the straw with
regular straws and throw them away after use. It is much hygein than wash
the straw. It leaks a little bit, but not too bad. You have to teach the
little ones the right way to drink, and so far he is fine with it.
Also, fyi...the school my son attends prohibits using the sipping cups for
all ages. The kids have to learn drink directly from cups before 18 months.
Sipping cups are waste, IMO. I have bunch of them with little use staying
in the pantry.