If you are not familiar with the Oral-B Hummingbird, it is a compact, battery-powered flosser that comes with 2 interchangeable attachments.
Despite its popularity, it was discontinued by Oral-B some time ago and is now very difficult to source. There was even a petition created asking Oral-B to bring it back, but alas, it didn't happen.
The good news is that even now, you can still get replacement flossers for it.
You can get replacement parts on Ebay
Previously they were also available from Amazon, but this no longer seems to be the case.
A cordless water flosser
Your best bet at this stage may be to switch to a cordless water flosser. They are larger and more expensive than the Hummingbird style flossers, but if you go with a well-known brand, you won't run into the issue of replacement heads being unavailable.
The main one we recommend is the Waterpik WP-560 Cordless Advanced. You can find out more in our post on the best cordless water flossers.
Alternatively, you could try non-powered interdental brushes, which are the best way to clean in between your teeth. You can find out more in our post on the best interdental brushes.
Waterpik Whitening Power Flosser
The closest possible option, that works in a similar way is the Waterpik Whitening Power Flosser FLW-220UK.
It has mint-flavoured replaceable tips, which are reasonably priced.
You can buy it on Amazon, although it is expensive because it's a UK import and the last time we checked it was difficult to find replacement tips on their own.
Why was the Hummingbird discontinued?
The Hummingbird is as far as most are aware, now discontinued and no longer manufactured or sold by Oral-B.
All products typically undergo regular review by internal product teams and decisions are made whether a product should be updated, replaced, removed from sale etc based on a number of commercial factors including demand, actual sales figures and the company focus.
Whilst Oral-B have not stopped operating within the oral healthcare space it is quite likely the demand was not high enough to warrant continued production and the company appear to have deviated from electronic flossing products like this to focus on the electric toothbrush, toothpastes and more traditional flossing products.