I only like sparkling water. So for years i have been bringing the smallest sized Pellegrino 250 ml bottles empty in my suitcase. They are glass I wish they were plastic as it would be even lighter. I also bring the regular sized small bottle 500 ml with me for my night stand.
Then I fill these bottles from the larger bottles I get in my cabin. The 250 ml bottles are so small they fit inside my three zipper small bag for shore excursions. I absolutely hate those metal bottles that they give on safaris as well. Don't use them at all. I hate drinking out of them. I take my small empty Pellegrino and Perrier bottles with me on safari as well. Mala Mala went to those nasty metal ones.
Change is always happening - I just find a way to adjust and these tiny 250 ml bottles are fantastic. On the Crystal Esprit I asked for Sparkling water and received my desired small 250 ml bottles - I was a very happy camper.