Sample: Free KEY all-natural ketone energy drink
Region: Available at various grocery stores and markets nationwide
How to Claim: Visit the link, claim the offer with your phone number, purchase a KEY energy drink at a participating retailer, then submit your receipt through Aisle for a full cash-back rebate
Bonus Info: KEY was co-founded by two female beverage industry veterans — one from Coca-Cola, one from PepsiCo — who wanted to create a cleaner alternative to the energy drinks they used to sell
Your next energy drink might just change everything.
KEY is offering a free can via a full cash-back rebate through Aisle — pick one up at a participating grocery store or market, submit your receipt, and get your money back in full.
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What makes KEY worth trying? It ditches the sugar and sky-high caffeine that power most energy drinks and taps into ketones instead — the same fuel your body naturally produces when fasting or exercising. The energy feels different: smooth, steady, and without the crash waiting for you an hour later. With zero sugar, low green tea caffeine, and nothing artificial, it comes in three flavors — Pineapple Passionfruit, Grapefruit Peach, and Ginger Lime — each worth discovering for free.
Savvy Sample Rating: 5/5 ⭐⭐⭐⭐⭐
- KEY was founded in 2024 by Karishma Thawani, formerly of Coca-Cola, and Tekla Back, formerly of PepsiCo
- This free offer is available through Aisle, a cash-back rebate app
- Claim the offer, buy KEY at a participating retailer, and submit your receipt to get fully reimbursed
- Available at various grocery stores and markets; one offer per person
- With a full rebate, KEY is completely free — a great way to try a genuinely new kind of energy drink
