- Arthro thumbs cup functional and lightweight for people WHO have decreased grip strength - Wrist pain - Hand deformities or need TO keep THE wrist in A neutral position - THE unique ergonomic design increases leverage of THE hand and aids in raising THE cup TO THE lips without wrist motion - THE thumbs grip reduces THE possibility of spilling due TO trembling - THE cup is double TO protect hands from heat or cold it holds 8 ounces ML - Leaving 1 - 5 CM of free space above THE liquid TO reduce spillage - Liquid ounce and metric measures are marked inside - Top rack dishwasher and microwave safe - 1 Unit