Canister and Automotive Vehicle Provided With the Same

A canister for an ORVR system comprising a casing internally provided with an adsorption layer capable of adsorbing and desorbing fuel vapor, wherein:

• the adsorption layer contains an adsorbing material, and a molded heat storage material molded from microcapsules in which a phase change substance is encapsulated, the phase change substance configured to absorb and release latent heat according to a temperature,
• the molded heat storage material is a heat storage material that has an average particle diameter of 0.9 mm or more and 1.6 mm or less and is molded in a columnar shape, and the adsorbing material has an average particle diameter of 1.0 mm or more and 1.8 mm or less, and
• the molded heat storage material comprises a first end surface on a first end side of a column axis of the columnar molded heat storage material, and a second end surface on a second end side of the column axis, when viewed in a direction orthogonal to the column axis, and an average value of R1/r and R2/r is 0.57 or more, where R1 represents a length of a curved surface of a first edge portion, which connects the first end surface and a circumferential side surface around the column axis, in a radial direction of the first end surface, R2 represents a length of a curved surface of a second edge portion, which connects the second end surface and the circumferential side surface, in a radial direction of the second end surface, and r represents a radius of a cross section of the molded heat storage material, in the direction orthogonal to the column axis.