For ice-cold water on the go, fill a reusable plastic water bottle 1/4 way full of water and lay it on its side in the freezer. Once it freezes you will be able to fill the rest with water and your good to go.
A fever up to 102°F is mild and can be treated by drinking plenty of fluids. To quickly bring down a reading above that, put an ice pack under your arm or near your groin. Icing either spot will cool your body’s core. It’s uncomfortable, but it works fast. Then see a doctor.
To soothe a sore back cut a slit into an old tennis ball, squeeze it open, fill it with water, and toss it in a freezer. Next time your back is sore, lie on your back, slip the frozen ball under your lower back, and roll around on it for soothing cold and pressure.
A few seconds before swallowing bad-tasting liquid medicine, suck on an ice cube. It’ll numb your tastebuds and make the medicine taste less nasty.