500ml double wall stainless steel vacuum flask easy taking

1) Capacity: 350ml, 500ml   750ml  1000ml  1200ml
2) Material: 18/0 or 18/8 stainless steel (as clients' request)
3) Double walls stainless steel vacuum insulated for maximum temperature
retention hot or cold, can keep warmth for 24 hours
4) Lightweight, unbreakable, streamlined to fit into any rucksack, briefcase
5) Can be spray painted or printed with clients' logos
6) Packaging can be white box, color box or black bag