SIMPLE FLASK was founded by engineers. The founder team of SIMPLE FLASK upholds the spirit of craftsmanship and is committed to creating more environmentally friendly, healthier and more durable products. All products of SIMPLE FLASK adopt copper-plated thermal insulation technology, and the thermal insulation performance of the products is better to ensure that your reusable water bottle is very suitable during the journey.

vacuum insulation technology

Advanced Insulation Technology

Our unique thermal insulation technology and the heat reflection of the copper plating layer ensure that your beverage keeps ice cold for a long time.

stylish life

Safe, Healthy, and ECO Friendly

You deserve the cleanest and healthiest water bottles. Our water bottles only use food grade 18/8 stainless steel, which is BPA-free and phthalate-free.

outdoor water bottle

Functional Design, Built for Life

The powder coating decorating surface assures that you stand out with an elegant and very durable bottle. We keep it simple, focusing on functional, and durable.

outdoor bicycling

Engineered Ice Cold

Our excellent vacuum insulation technology and copper plating thermal insulation enhancement technology ensure that the beverage in the vessel remains ice cold, which we call “Engineered Ice Cod”.

engineered ice cold
leak proof flask

Leak Proof Design

The industry-leading structural design and the high-precision silicon water sealing ring ensure that your water bottle will not leak water, will not wet your laptop or documents, allowing you to travel with peace of mind.