Ivory Tube Crystal Toothbrush

Putting together the clues, here’s a probable product description for “Ivory Tube Crystal Toothbrush” (or something very similar):
Handle Material: Plastic (likely a clear or semi-clear “crystal” style plastic)

Color / Finish: Ivory (or branded “Ivory”) for part of the handle or head + transparent crystal plastic parts

Bristles: Soft or Extra-Soft nylon bristles (common in such brushes)

Cover / Hygiene: May come with a protective plastic cover to keep the brush head clean / hygienic when stored / carried .
Packaging / Tube: The “tube” in name could refer to either the storage / packing tube (for travel) or the shape of the handle (a cylindrical handle).