They’re made from rubber, silicone, recycled plastic, and common plastics such as polyethylene, polypropylene and polyurethane.
Sizes range from compact trial/mini lengths (about 1.48 inches) up to several inches long (around 7 inches in the data). Some models are labeled travel or trial size; one refillable roll-on is sized to hold 100 ml (3.4 fl oz) for hand-luggage limits.
Several models include a suction-cup base or similar feature so the applicator can stand upright on flat surfaces, keeping the head off counters and making it easy to set down during use.
They help keep hands and nails cleaner, reduce mess, spread cream more smoothly and speed application. Some designs also include suction-cup bases for standing upright and compact sizes for travel.
Brush-style spatulas spread cream smoothly and quickly for broader coverage, while roller-ball and sponge roll-on designs promote even, mess-free distribution.