Where can I buy really cute swim diapers?

You can choose from a variety of brands and colours on Qoo10.sg -- for example, Huggies Little Swimmers Baby Pool Diapers for 13.90SGD++. Other brands on sale include Goo.n and Bubble Guppies.

Pupsik has cute swim diaper at $12.90 only. There are few designs for you to choose from. http://www.pupsikstudio.com/my-swim-baby-swim-diaper.html

Here's another website: http://www.lazada.sg/shop-swim-diapers/ Personally, i think the Nautical Theme one quite stylish. ;)

Saw some at robinsons and also at Mothercare. Brand was Charlie banana and retailing for about $20. For above bubs above 5kg :)

thanks