For those accustomed to drink water at midnight, it is necessary to put a cup beside the bed. However, on the one hand, turn on the light will absolutely eliminate the drowsiness; on the other hand, without light, the cup might be knocked over accidentally. So you need a glow ring like this.

It is made from glowing silicone which can help you locate our cup in the dark without worry about the dilemma.

Buy it here