{"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":"2026-11-05T04:10:57+00:00","price":"18.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0HH8BVZPN?maas=maas_adg_api_588052515283475030_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBf3f02c3e232dee00843a38531c9c53d5_35ce318e9b6c&aa_adgroupid=ff64edd2cddc739c950e172704bedaad_PBSEP_!!!affid!!!_118045_&aa_creativeid=097dmc6T7h1VTZ0_aqg6UHS5_alGc4ETlP5HHyyfwA_adm5yiI_c"}],"product":{"brand":"pluseight UK","evidence_url":"https://mainbuyer.com/evidence/products/660ml-20oz-stainless-steel-tumbler-with-straw-leak-proof-double-wall-travel-coffee-mug-b0hh8bvzpn/prices","gtin":null,"id":21561,"model_number":null,"name":"660ml/20oz Stainless Steel Tumbler with Straw, Leak\u00e2??Proof Double Wall Travel Coffee Mug","product_url":"https://mainbuyer.com/product/660ml-20oz-stainless-steel-tumbler-with-straw-leak-proof-double-wall-travel-coffee-mug-b0hh8bvzpn","urn":"MB-AWIN-GB-B0HH8BVZPN"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"18.99","historical_low":"18.99","last_observed_at":"2026-11-05T04:10:57+00:00","low_30d":"18.99","low_90d":"18.99","median_price":"18.99","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-11-05T04:10:57+00:00"}}