Compliance is the least glamorous part of importing drinkware and the most expensive to get wrong. This is the short version.
United States
FDA food-contact compliance for the materials touching liquid, plus California Proposition 65 for lead, cadmium and other listed substances if you sell into California — which, in practice, means the whole US market.
European Union
LFGB (Germany) is the standard most buyers quote even outside Germany, alongside EU framework regulation 1935/2004 and the REACH requirements on SVHCs.
What to demand from your supplier
A test report issued against your product and model number, from a recognised third-party lab, dated within the last 12 months, listing the specific migration limits tested.
Keep the chain intact
Store the reports with the PO number. If a recall question ever arrives, the first thing anyone asks for is the document trail.