4 oz boston round glass container: These glass containers are available as cobalt blue boston rounds.  There are 128 per case.  Priced and sold in case quantities -- call or email for additional discounts on large quantities.

Order closure separately.  Use a 24-400 dropper, cap or a 24-410  fine mist sprayer.  You'll find these closures in the Caps for Glass Boston Rounds and Boston Round Natural LDPE/HDPE Caps categories of this website.