Bamboo Square 4-Coaster Set with Holder. Gift an eco-friendly customized Bamboo coaster set and your engraved company logo will display prominently for all to see. This five piece coaster set includes four bamboo coasters and a bamboo caddy for storage. Each coaster comes with 4 felt pads on the bottom to prevent surface scratches. Coasters are sealed with polyurethane (base) & nitrocellulose chips (surface). Laser engraving for personalization on each coaster is included in the price. Flasks and Bar Items