My wife came up with this one and I always thought it was really clever.
As we have to manage food allergies, it’s important for us to always have a dose of antihistamines at the ready when we’re eating out. Each “eye” of a contact case holds about 2.5ml, which is a typical dose of Piriton. Our son will drink directly from the contact case.
A contact case will give you two doses of Piriton, which for one-day outings tends to cover our needs. And now we no longer need to bring out a heavy bottle of medicine or have to deal with washing a syringe!