Colored Lady cups and lube

I just bought both the blue ladycup and lilacup on the ebay site for ladycup. They were about $15 and $18. I haven't even had the guts to use my clear one yet but it was such a steal that I thought I could sell them if I didn't have success with the clear one. I spent on two what I would have on one and have a coupon. I might send my cousin one. What brand of lube here in the US is good to use on silicone cups?