The 12 piece range is priced from £15 to £32 and includes key rings, stickers, an iPhone case and two tone wristbands with bold colours and a "Monster Fish" motif throughout.
As part of this Topshop x bPay partnership, which appears to be UK only, shoppers will get a bPay contactless payment chip to slot inside the accessories.
If you haven't heard of Barclaycard's Apple Pay rival, Visa and MasterCard users can join up to the digital wallet service - the upper limit, as with all contactless payments, is now £30 per transaction in the UK. How quick, easy or awkward a contactless payment is to carry out will depend which accessory you choose.
And, hey, we're sure some Topshop customers will buy the accessories without realising they can pop a bPay chip inside. After all, people are wearing tech enabled jewellery, trackers and watches for style points these days. Barclaycard knows exactly what it's doing.
The initial, eye-popping Monster Fish collection will be followed by a second collection with a "luxe metal and snake effect design" which will hit Topshop stores later in 2015.
All in all, it's a clever collaboration which means Topshop can launch accessory collections as it usually does and just build in hidden slots for a bPay chip to give customers that option.
"This is a really exciting partnership with Topshop," said Tami Hargreaves, commercial director of digital consumer payments at Barclaycard, "and marks the first time that our bPay chip is being incorporated into a product range from a major fashion retailer."
The accessories will be available in select Topshop stores - your best bet in London is probably the flagship Oxford Circus store - and online at Topshop.com from 17 November.