“Holding Onto Warmth is Human Instinct.”
Brought to you by ovject, a Japanese enamelware heritage brand established in 1999, the Bottle in Bottle redefines daily hydration. By seamlessly combining an outer double-wall vacuum stainless steel bottle with a removable inner enamel flask, this innovative design solves a classic dilemma—allowing you to carry acidic beverages, milk, and coffee without metallic taste interference or safety concerns.
Key Features
Pure Flavor Preservation: The premium enamel interior creates an inert surface that prevents metallic taste transfer. Safely enjoy coffee, tea, lattes, fruit juices, or hot soups in their truest flavor.
Smart Pre-Cooling: The inner enamel flask can be chilled in the refrigerator beforehand. Simply slip it into the vacuum outer bottle before heading out for instant portability.
Modular 2-in-1 Design: Both the enamel flask and the stainless steel outer bottle can be detached and used independently to suit different occasions.
All-Day Temperature Control: Keeps your drinks hot or ice-cold for up to 8 hours
Capacity
Enamel Flask: 320ml / Stainless Steel Bottle: 440ml
Weight
Enamel Flask: 240g / Full Set (Bottle in Bottle): 495g
Dimensions
Φ75.3mm × H 213.8mm
Materials
- Outer Bottle: 18-8 Stainless Steel
- Inner Flask: Enamel-Coated Steel
- Lid & Pad: Food-Grade Silicone
- Mouth Ring: ABS Resin
- Insulation Performance 8 Hours (Heat Retention: ≥58°C / Cold Retention: ≤11°C)
Included in Set
Vacuum Stainless Steel Bottle (with lid), ABS Mouth Ring, Enamel Flask (with silicone lid), Silicone Anti-Collision Pad
Important Care & Usage Notes
Outer Stainless Steel Bottle: Do NOT store acidic beverages, dairy products, or soups directly in the outer stainless steel bottle without the enamel inner flask.
Heating Warnings: Do NOT heat any part of the product on direct flames, induction cooktops, or in microwaves.
Dishwasher Safety: Hand washing with a soft sponge and mild detergent is recommended to preserve the enamel coating and vacuum seal. Avoid abrasive scrubbers.
Handling Enamel: Enamel is a glass coating over steel; handle with care to avoid drops or heavy impact that may chip the interior surface.

































