Accessories are the easiest margin add-on in vape retail. Lanyards and carry cases cost £1-2 wholesale and sell for £5-8. A USB-C charging cable costs £1.50 and sells for £5. Cleaning kits cost £2 and sell for £8-10.
Place accessories near the till point. When a customer buys a pod device, suggest a carry case or lanyard at the counter. 20-30% of customers will take the add-on.
TrackElf's inventory system tracks accessories as separate SKUs, so you know when to reorder low-margin but high-turnover add-ons.