2PCS Solar Powered Cup Holder Bottom Pad with LED Light
Set of 2 solar powered with LED lights cup holder
These holders are waterproof, scratch proof with high hardness and stability.
Just place them under the sun for 6 hours and you can already use that for up to 30 days with low power consumption.
It also has a built in light and vibration sensor that will make the holders turn on when it gets dark or feels the vibration.