Per a Reddit thread, Sigg (Switzerland-based) seems to be the only company to actually manufacture their products in Europe. They don't have a Stanley-style tumbler, though their bottles do go up to 1.5 L.

For Stanley-style bottles designed in the EU but manufactured in China, the options include:

• Vann One Tumbler (1.2 L, Netherlands)

• Lurch Big Cup (1.2 L, Germany)

• Airam Jumbo (1.2 L, Finland)

• Waterdrop Explorer (1.1 L, Austria)

• Kambukka Rio (950 mL, Belgium)

• 24bottles Straw Cup (800 mL, Italy)