Goggles

He's right, of course. Swim goggles are made to be worn, not kept. Why wait 'til the pool when you can wear them in the post office, the library, the newsagent, the car, while friends are round and even for tea?

Beware getting your ears nipped while adjusting though. Big sister peered round at one point and noted, "His little tears are filling up the goggles."