I found a new use for my Glow in the Dark Nalgene bottle. I placed the Petzl Tikka 2 inside the Nalgene and closed the lid carefully. You can use the Petzl’s garter to hold or hang the Nalgene. Make sure to throw all the water inside the Nalgene before putting the headlamp. Put the Petzl to its possible maximun lumens.