These mini bath mats are £4.99 at Babies R Us, which strikes me as a good price. They're cheaper than the average standard bath mat but look easier to clean.
You get six in a pack and it seems you simply to stick them to the bottom of the bath or shower to help prevent little ones from slipping. The product description says they stick easily, and help make bath time fun as well as safe.
They are brightly coloured and shaped like various different sea creatures.
Here is a review from the Babies R Us site:
"We were looking for something for the bath for safety precautions and these were perfect! They are so bright, both my children love them! some are stuck on the bottom of the bath and some are used as toys, it's really livened up bath time! For younger children I would still recommend a full sized non slip mat as these don't cover the whole bath but in terms of fun and entertainment I'd buy them again and again."
You can use the click and collect in store service, too, to save you having to pay delivery charges.