# Skincare refill checklist: compare sizes and formulas in Singapore Check formula, pack volume, realistic usage and checkout route before buying a skincare refill. By: ShopBack Discover editorial team Published On: 2026-09-25 Verified On: 2026-09-25 [Editors](https://discover.shopback.sg/authors) · [Editorial policy](https://discover.shopback.sg/editorial-policy) For a skincare refill, buy the formulation and volume you will use, not the largest bottle by default. Compare ingredient list, pack size, price per millilitre and delivered total at Sephora or Guardian. Sephora excludes The Ordinary products from its ShopBack listing, and both stores have code conditions; check the current merchant page before choosing the checkout route. ## Confirm the formula and version first Keep the empty bottle or its full product name nearby. Match the cleanser, serum or moisturiser's variant, concentration if stated on the package, volume and intended use. A similar-looking reformulation may not suit someone who wants to reorder exactly what they already use. For a new product, check the brand's stated usage directions and ingredient list on the specific listing rather than assuming all products in a range behave alike. If the desired version is unavailable at one shop, choose deliberately between waiting and selecting an alternative. A different active ingredient or fragrance is not a direct price match. This checklist concerns buying the right refill; it does not diagnose skin conditions or promise a particular result. ## Work out usable cost, not maximum volume Compare the same formula in the sizes actually offered. Divide item price by volume to see the unit cost, then add delivery to the intended basket. A larger container may have a lower cost per millilitre but a higher total outlay; consider whether you can use it within the period and storage conditions printed on that product. Do not assume a universal after-opening lifetime for all skincare. For an explicitly hypothetical calculation, a 100 ml bottle at SGD30 is SGD0.30 per ml, while a 200 ml bottle at SGD54 is SGD0.27 per ml. Buying the larger size saves SGD0.03 per ml only if you use it; an unused half bottle is not a saving. Add the actual checkout delivery cost to compare purchases rather than pretending these illustrative prices are store offers. ## Check the store-specific exclusions On ShopBack Singapore, Sephora excludes The Ordinary and Dyson products, Sephora app purchases, gift cards and certain voucher or store-credit redemptions. If your desired refill is The Ordinary, do not treat a general Sephora Cashback category as covering it. Guardian's ShopBack page excludes shipping and delivery from Cashback and describes an adjustment for partial returns. These terms affect a planned purchase in different ways. Both merchant pages exclude purchases made with vouchers or promo codes not featured on ShopBack. ShopBack's Singapore tracking help also says the online shopping journey must start from ShopBack and warns about third-party codes. Compare an immediate code reduction as a definite checkout price, and any eligible Cashback as a separate possible later benefit. ## Order the refill you actually need Before checkout, confirm formulation, quantity, size, listed seller, delivered price and the store's return details. Avoid buying extra refills merely to cross a delivery threshold unless you know they will be used. For a first-time product, a smaller size can limit the cost of a poor fit even when its unit price is higher. Once you have chosen Sephora or Guardian, open its ShopBack Singapore page and follow its displayed shopping route. Keep the order confirmation and product variant. The ShopBack Singapore glossary defines Pending Cashback as not yet validated by the partner and Confirmed as added to available balance; the refill purchase should stand on its product and payable price. ## Frequently asked questions ### Is the larger skincare bottle always cheaper? It may cost less per millilitre but more overall; compare the quantity you expect to use and the complete delivered price. ### Does Sephora's general listing cover The Ordinary? No. The Sephora ShopBack Singapore page specifically lists The Ordinary among excluded products. ### Can I count delivery in Guardian Cashback? Guardian lists shipping and delivery among amounts excluded from Cashback; include delivery in your cash-price comparison instead. ## Stores mentioned - [Sephora terms](https://discover.shopback.sg/stores/sephora) · [Shop at Sephora](https://www.shopback.sg/sephora) - [Guardian terms](https://discover.shopback.sg/stores/guardian) · [Shop at Guardian](https://www.shopback.sg/guardian) ## About this guide The linked sources document ShopBack processes and merchant terms; any arithmetic examples are illustrations, not verified current prices or cashback amounts. Offers and exclusions can change. Check the current local ShopBack merchant page for the applicable terms before shopping. ## Related guides - [Beauty shopping in Singapore: compare the products you use](https://discover.shopback.sg/guides/beauty-shopping) - [Cashback after a partial return: what to check in Singapore](https://discover.shopback.sg/guides/cashback-partial-returns-singapore) - [Beauty store roundup: Sephora and Guardian in Singapore](https://discover.shopback.sg/guides/singapore-beauty-stores-sephora-guardian) ## Sources - [Sephora on ShopBack Singapore — The Ordinary and app exclusions](https://www.shopback.sg/sephora) - [Guardian on ShopBack Singapore — shipping and returns](https://www.shopback.sg/guardian) - [ShopBack Singapore Help — starting a tracked shopping journey](https://support.shopback.sg/hc/en-gb/articles/360039674633-Cashback-tracking-issues-Missing-or-incomplete-Cashback) - [ShopBack Singapore Help — Pending and Confirmed statuses](https://support.shopback.sg/hc/en-gb/articles/360039178134-Cashback-glossary-What-the-different-terms-mean)