Think Tank Photo R U Hot? Fits up to 32oz water bottle, hat/gloves, energy bars (water bottle not included) Folds flat when not in use One-hand drawstring closure Attaches to any Think Tank Photo belt or beltpack (sold separately) Exterior Dimensions: 8.3" H x 4.0" Diameter (21.1 x 10.0 cm), Internal Dimensions: 7.5" H x 3.8" Diameter (19.0 x 9.7 cm), Weight: 0.3 lbs (0.1 kg)