Mountain Trip Wildo Folding Cup Insulated Set

Official retail price: 4190 yen

There is peeling in the area circled in red in the seventh photo.

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Quoted below:

This is a set of a thermal case (cozy) and lid for the popular Wildo Fold-a-Cup, loved by ultralight hikers. It allows you to turn your Wildo Fold-a-Cup into a thermal mug, keeping hot drinks warm for longer.

Specifications:

Case weight: 9g (Lid: 2.7g)
Materials: Dyneema® Composite Fabric 2.92, Astrofoil

Features:

The inside is made of Astrofoil and the outside is made of Dyneema, two types of high-spec fabrics bonded together.

The insulation and heat shielding provided by Astrofoil keep the contents of the Fold-a-Cup from cooling down quickly. The durability of Dyneema ensures long-term use.

Placing the lid on top further enhances its heat retention capabilities.

The folded height of the Fold-a-Cup is uniform, allowing for compact storage.
A cord attached to the lid can be used to secure it to the main body, preventing it from coming off.

About Astrofoil:

Astrofoil is a material that stores and retains heat from a heat source placed inside a screw-lock container. It also insulates against outside air, preventing rapid cooling.
・ 97% heat reflectivity
・ 99% aluminum purity
・ Cuts cold air (heat) penetration by 36-47%