My gratitude to Sigg UK of Bury St Edmunds who honoured the advertised five-year warranty on my one-litre Traveller bottle.
Technically the exterior damage is irrelevant, the actual problem was that the inner liner was disintegrating on the base of the bottle, exposing the contents to the aluminium. Despite the hard life this bottle has suffered, Sigg stood by their word and replaced it without qualms.
And my disdain towards Tiso of Belfast, from whom it was originally purchased in 2008, for refusing to handle this warranty return because it "wasn't cost effective" for them to do so. If anyone knows the name of the chap with the ponytail in Tiso, who usually wears a buff on his wrist, please let me know so I can write a polite letter to him and his manager.