Needs more thought......
No more nasty teeth scraping and struggle for guineas to get enough water BUT no connecter to cage (buy bungee), water has to be replaced daily as piggies drink whilst eating (it seems) and is chore to move. Bottle needs to screw into dish so no more big spills, dish needs to be deeper (to avoid spillage), should fill from top, wish smaller bottles on offer as is unwieldy esp as doesn't connect to dish so accidents often occur when filling/removing to clean.