Fitted coaster for a beverage container

A fitted coaster for a beverage container, comprising:

• a circular base;
• a first sidewall extending substantially perpendicularly from the base, the first sidewall comprising:
• a first lateral edge and a second lateral edge opposite the first lateral edge;
• a first top edge and a first bottom edge opposite the first top edge;
• wherein the distance between the first top edge and the first bottom edge tapers toward the first lateral edge and toward the second lateral edge, such that the distance between the first top edge and the first bottom edge is shortest at both the first lateral edge and the second lateral edge;
• a second sidewall extending substantially perpendicularly from the base, the second sidewall comprising:
• a third lateral edge and a fourth lateral edge opposite the third lateral edge;
• a second top edge and a second bottom edge opposite the second top edge, wherein the first lateral edge is attached to the third lateral edge and wherein the second lateral edge is attached to the fourth lateral edge;
• and
• wherein the distance between the second top edge and the second bottom edge tapers toward the third lateral edge and toward the fourth lateral edge, such that the distance between the second top edge and the second bottom edge is shortest at both the third lateral edge and the fourth lateral edge.

A fitted coaster for a beverage container, comprising:

• a blank from which the fitted coaster is assembled, the blank comprising:
• a circular base;
• a first sidewall extending from the circular base, the first sidewall comprising:
• a first lateral edge and a second lateral edge opposite the first lateral edge;
• a first top edge and a first bottom edge opposite the first top edge, wherein, in a disassembled condition, the first top edge is curved and the first bottom edge is straight, and the first bottom edge is connected to the circular base;
• a second sidewall extending from the circular base, the second sidewall comprising:
• a third lateral edge and a fourth lateral edge opposite the third lateral edge;
• a second top edge and a second bottom edge opposite the second top edge, wherein, in a disassembled condition, the second top edge is curved and the second bottom edge is straight, and the second bottom edge is connected to the circular base.