Bobbi Brown Long-Wear Waterproof Liner

As pools, beaches, the sea and Alton Towers' log flume beckon, this is a timely addition to our make-up bags. A fine, twist-up eyeliner that really and truly is budge-proof and waterproof. The secret? It's created with minimal oils (and according to Bobbi Brown, 'was tested in the most humid, demanding climates to ensure maximum staying power.'

That's certainly our experience – and it's a new addition to the summer make-up kit around these parts, available in a choice of eight deep, dark, smokey shades offering highly opaque coverage.

Set to make a splash, we'd say.

Bobbi Brown Long-Wear Waterproof Liner/£24 at johnlewis.com