I have the tin box in which a bottle of something warming was sold, and a pair of ‘er ladyship’s laddered tights, which live in said tin. Cut plasticard to appropriate dimensions, attach to outside of tin using multiple layers of legwear, ensuring the long edge is aligned with the convenient seam in the tin. Apply boiling water, internally and externally, have a cuppa with the rest of the boiling water, empty the hot water and refill with cold. Apply roof to vehicle, dry tights and return to tin.