Sea to Summit Frontier UL Collapsible Cup

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UOG TOP PICK: The Sea To Summit Frontier UL Collapsible Cup is an updated version of the popular X with a 400ml capacity. It is constructed with glass-reinforced nylon, ensuring durability, and food-grade, heat-resistant silicon for safe and convenient use. The updated classic is a Top Pick of ours.

Sea to Summit says: 

A BPA-free and ultra lightweight collapsible cup. The Frontier Cup’s flexible silicone walls collapse easily, making it a pocket-sized drinking cup you can take anywhere. The rigid rim maintains its shape and is heat resistant for your safety and peace of mind.

Our Verdict

Sea To Summit has reimagined the Frontier UL Collapsible Cup, the predecessor to the celebrated X cup. The Frontier UL comes with a 400ml capacity, an ideal quantity for a satisfying morning cup of tea or coffee. The cup has undergone significant upgrades compared to its predecessor. Reinforcement with glass-reinforced nylon at the top, middle, and base enhances durability and reduces the risk of tipping. Crafted from food-grade, heat-resistant, and flexible silicone, the cup’s body compresses effortlessly, saving precious space in your backpack or cooking kit.

– Reviewed by Ultralight Outdoor Gear

Features

• Nests into Frontier 2L collapsible pot
• Collapses flat to 17mm for compact packing
• BPA-free, food-grade, heat resistant, flexible silicone sides
• Nylon rings at the top, middle and base maintain shape and prevent fingertips from being scalded

Specifications

• Weight: 53g
• Dimensions: L 10.1 x W10.1 x H8.8 (cm)
• Capacity: 400ml

Material & Construction

• Base and rim: 30% Glass reinforced nylon 66
• Side Walls: 100% silicone

Help & advice:

• What does BPA Free Mean?