Cold water when travelling (TO drink before the beer)

Hi everyone,
I know I might be a bit slow on the uptake but I thought I would share with you all this bit of info, recently I realised that a great way to have icy cold water for the other half and I while on holidays was to use a the Glad ice cube bags (right size fits down thermos neck) and freeze over night in caravan fridge or chescold freezer then put in thermos and fill with ordinary water and gives you cold water for up to 48 hours, or use it at lunch and refill for cold water at night (i know that is when the beer or wine comes out) It is really nice to have really cold water when it is boiling hot, so now when we travel we take to thermos one for a cuppa and the other for really cold water. The Glad ice cube bags are effective as they can be slid into any small space in the freezer as space is usually limited. Hopes this helps some one else
Barb