The Pari Trek-S has been fantastic for me on short and longer term trips (a month). Haven’t had any issues. I bought the portable battery so I charge it during the day and then can move around the house with it during treatment. I use the Pari Nebulizer cups which can be boiled. I typically soak in warm water and dishwashing detergent and then boil for 10m after rinsing. (if you don’t have a sterilizer while traveling).