You may be familiar with fatberg, a mass of non-biodegradable solids and fats found in sewers, which suggests -berg has been innovated (presumably via iceberg). And now London is also haunted by a concreteberg.
Late great tech unicorn Theranos made use of a proprietary blood-collection device they called the nanotainer (via container), and I recently found out about vacutainer and a security software package called Cryptainer. So -tainer has been liberated.
The other day in Queens I saw a sign for a Mathnasium, presumably extracted from gymnasium, and the Corpus of Contemporary American English also has a token of jamnasium (a space for jam seshes), suggesting a nascent -nasium.
In a recent, widely-derided ad campaign, Applebee’s coined sizzletonin on analogy with the neurotransmitter seratonin and the hormone melatonin, but as far as I know that’s the end of the line for -tonin.