have been using this one for more than a decade now: https://www.wasser-aktuell.com/products/1-0l-trekkatanka%E2%84%A2-edelstahl-trinkflasche-mit-edelstahl-wav

have been using this one for more than a decade now: https://www.wasser-aktuell.com/products/1-0l-trekkatanka%E2%84%A2-edelstahl-trinkflasche-mit-edelstahl-wave-verschluss https://www.wasser-aktuell.com/products/1-0l-trekkatanka%E2%... small dents, but no no issues with lid or seal