I own larger travel mugs which are good for camping, however don't let the small size of these put you off as they are perfect for walking or picnics. Aswell as been small and lightweight, they are just the right size for soup and been double walled, insulate the soup while keeping the outside cool.
Having the lid prevents spills but also means if it's not possible to rinse out/ wash fully it does keep rucksack clean until you can.
Nice product :-) Thank you