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A rigid ring within the rim keeps the X-Mug from Sea To Summit stable when filled. When the collapsible walls are folded down, it takes up very little room in your rucksack, yet it can hold almost half a litre of hot or cold liquids.

  • Material: Food grade flexible silicone 
  • Folds flat
  • Calibrated as a measuring cup 
  • Volume: 480ml
  • Diameter: 9.5cm x 7cm
  • Weight: 60g
Product Code: D3432040