So far I had only appended 0,5 l bottles at the bottle carrier (rubber). This widerum was hooked to the carabiner to the belt loop. Have to say, it keeps the (0,5 l) bottle reliably and I hardly notice. Even in tight Menschengedrängel while shopping (the / one or the other touches a yes times in passing) it has held easily.
Additional info: The band to which the bottle carrier made of rubber and the key rings are off, is a Velcro fastener. At first I was a bit skeptical about whether the holding. Meanwhile, my concerns have been dispelled. The band and the velcro are very stable.
My friends (mostly the male part) is also excited about it and want to buy a part. :-)
Shipping fast and flawlessly. Again any time!