Possible Clues:

• Parts of pts
• They may be fluid: Abbr
• Starbucks units: Abbr
• Dispensary measures: Abbr
• The 40 in a '40,' for short
• 1.5 in a jigger: Abbr
• Small wts
• Dealer's measures: Abbr
• Weed wts
• Bar measures: Abbr.