KK are leaking, what to use now?

[Ceepa]

Apparently the KK is leaking in DC's lunchbox. The lid is put on pretty tight and I'm using the flat cap, which is supposed to seal well.

Alternatives? I would prefer to have as few pieces to wash every day so nothing that has to be taken apart into a bunch of components for cleaning.

ETA: Right now I only put water in but have been toying with the idea of milk. So is there also something that would keep milk cool? If not then I'm happy to just keep sending in water. Thanks!

[Melaine]

I would email KK if you are having issues. Their customer service rocks, and it should NOT be leaking.

[LBW]

I'm trying out these:

http://www.amazon.com/Rubbermaid-RefillReuse-oz-Water-Bottles/dp/B002BKT6HU/ref=pd_sbs_k_4

The same set of 9 bottles was $14 (IIRC) at Costco last week. So far so good.

[brittone2]

DD dropped a KK sippy a few weeks after we bought it. It cracked vertically. Their customer service was fantastic.

It shouldn't leak. A replacement cap might be enough.