If you're more into beauty products, maybe a lipstick flask is
WineOvation The Original WineRack Booze Bra Flask - Adjustable
EDITABLE TEMPLATE Wine Bottle Labels, Red Floral Princess
The Original Winerack Booze Bra Flask - holds a bottle of wine
TORO BRAVO TEMP/MERLOT – The Pourium
Flask For Wine Bra Sling Bag - Buy Flask For Wine Bra Sling Bag
This Wine Flask Bra Will Give You A Boozy Bust
Sports Bra Hidden Flask Pouch for Women: Portable 25oz
Brau de Bot - Sant Josep Vins
Sports Bra Hidden Flask Pouch for Women: Portable 25oz
Wine Bottle Cover Bra Shape Handmade Knitted Beer Tea Cup Cover
How to Conceal Alcohol - Creative Flasks
LED Wine Feeding Bra