{"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":"2026-09-17T12:30:44+00:00","price":"13.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0FB35LF4S?maas=maas_adg_api_588052515283475030_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBf3f02c3e232dee00843a38531c9c53d5&aa_adgroupid=c2a2773aef900f876ea53f3d10119e97_PBSEP_!!!affid!!!_118045_&aa_creativeid=3555_bkxV8K4lONQpQk859QQmLn53j6ZypadC3VJQangC4NY_c"}],"product":{"brand":"pluseight UK","evidence_url":"https://mail.mainbuyer.com/evidence/products/stainless-steel-tumbler-with-straw-600ml-20oz-tumbler-with-leak-proof-reusable-double-walled-water-bottle-thermo-coffee-travel-mug-silver-b0fb35lf4s/prices","gtin":null,"id":13120,"model_number":null,"name":"Stainless Steel Tumbler with Straw, 600ml/20oz Tumbler with Leak Proof, Reusable Double Walled Water Bottle, Thermo Coffee Travel Mug (Silver)","product_url":"https://mail.mainbuyer.com/product/stainless-steel-tumbler-with-straw-600ml-20oz-tumbler-with-leak-proof-reusable-double-walled-water-bottle-thermo-coffee-travel-mug-silver-b0fb35lf4s","urn":"MB-AWIN-GB-B0FB35LF4S"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"13.99","historical_low":"13.99","last_observed_at":"2026-09-17T12:30:44+00:00","low_30d":"13.99","low_90d":"13.99","median_price":"13.99","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-09-17T12:30:44+00:00"}}