iEGrow via Amazon offers Prime members its iEGrow 7-Color Touch Sensitive Tumbler Night Lights in Blue, Pink, or Yellow, model no. YGH-557, for $7.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, it costs an extra $6.65.) That's $6 off and the best price we could find. It features three lighting modes and a silicone cover.