Purchase price left null: the BigGo Singapore aggregator (https://biggo.sg/s/coway+water, verified 2026-08-06) lists this model (attributed to "Coway Singapore Official Store" on Shopee) at a range of "$588.00–$738.00", which the schema's single-number field can't represent without misrepresenting a specific variant's price as the base/standard price — the price likely varies by colour or bundle, but which figure is the true "standard" price is not established here. Record for reference only; re-verify manually before use. The Shopee listing itself (product_url above) returned no readable content to automated fetching. coway.sg's own product pages did not expose pricing (see brand notes). Coway Mate is Coway's non-electric, mains-pressure-driven, ambient-temperature-only unit ("does not require electricity ... operates entirely by water pressure ... one twist extraction") per third-party description of the Malaysia-market equivalent — treated here as direct_pipe (mains-connected) since it is a plumbed, no-tank unit rather than a manual jug-fill device, though this exact wording was not confirmed on an SG-official source. Filtration marketed (MY-market sourcing, not SG-confirmed) as "Plus Sediment + Pre-Carbon Filters"; not classified as RO/UF here for lack of SG-source confirmation.