Accommodation. Try to choose long-term stays, which minimizes room service, which means the release of chemicals during cleaning. For the same reason, do not overuse daily cleaning unnecessarily. Take your hygiene products. Firstly, hotels tend to use inexpensive, non-sustainable shampoos and shower gels, and secondly, it reduces the amount of waste: used bottles and soap bags.
Souvenirs. You are probably already tired of the same type of Chinese magnets. So maybe you should look for something interesting? Many local artisans make excellent, authentic widgets that will be a truly unique gift. Also, think of edible souvenirs. Yes, it is no longer surprising in our time, but you must agree that it is nice to get natural Italian wine from Italy or a traditional German pretzel. The main thing to remember about the storage time and duration of the flight