Came to know these devices after moving from Northern Europe to South few years ago. First two of these were destroyed when I repeatedly forgot to fill them wit

Came to know these devices after moving from Northern Europe to South few years ago. First two of these were destroyed when I repeatedly forgot to fill them with water - the plastic handle just melted before I realized my error. Seals usually last years even if you use the device several times a day. Apart from that, they indeed never break.