{"dataset":"MainBuyer UK price observations","market":"GB","market_name":"United Kingdom","methodology":"Each observation is stored only when MainBuyer has a timestamped checked retailer offer. Missing days are not interpolated or invented. Historical low, high and median figures use recorded in-stock observations only.","observations":[{"currency":"GBP","in_stock":true,"observed_at":"2026-09-17T12:29:01+00:00","price":"15.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0GK5VZ2XK?maas=maas_adg_api_588052515283475030_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBf3f02c3e232dee00843a38531c9c53d5&aa_adgroupid=0b862d848eb8149dbdf24308f3d59129_PBSEP_!!!affid!!!_118045_&aa_creativeid=3ad7X3Af_arQiNHV66vvuWHHtHGISArgLKMpxSD4DMwwpePw_c"}],"product":{"brand":"pluseight UK","evidence_url":"https://www.mainbuyer.com/evidence/products/stainless-steel-tumbler-with-straw-750ml-25oz-reusable-leak-proof-water-bottle-travel-portable-coffee-mug-for-hot-and-cold-fit-in-car-cup-holder-b-b0gk5vz2xk/prices","gtin":null,"id":10451,"model_number":null,"name":"Stainless Steel Tumbler with Straw, 750ml/25oz Reusable Leak Proof Water Bottle, Travel Portable Coffee Mug for Hot and Cold, Fit in Car Cup Holder (B","product_url":"https://www.mainbuyer.com/product/stainless-steel-tumbler-with-straw-750ml-25oz-reusable-leak-proof-water-bottle-travel-portable-coffee-mug-for-hot-and-cold-fit-in-car-cup-holder-b-b0gk5vz2xk","urn":"MB-AWIN-GB-B0GK5VZ2XK"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"15.99","historical_low":"15.99","last_observed_at":"2026-09-17T12:29:01+00:00","low_30d":"15.99","low_90d":"15.99","median_price":"15.99","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-09-17T12:29:01+00:00"}}