Your factory direct source for rigid plastic boxes.


Alpha Rho is the largest manufacturer of high quality rigid plastic boxes in New England. For over 50 years, Alpha Rho has been a leading supplier of injection-molded plastic boxes, with a reputation for providing dependable plastic packaging solutions. Our plastic box manufacturing company offers:

Custom rigid plastic boxes— compartment boxes, plastic boxes with hinged lid, friction fit plastic boxes, round plastic containers with lids, heart shaped boxes, custom shaped plastic boxes Private label—custom printed for individual branding, such as clear gift boxes with lids to hold your product or a party favor

Stock/standard plastic packaging, plastic boxes, and plastic containers. Reliable delivery Service to multiple industries, including retail and hobby, food and confectionary, medical/dental, electronics, industrial, and more!

A hands-on company, Alpha Rho is known for agile response times and approachable customer service, setting the bar in the designing, manufacturing, and printing of innovative, high-quality plastic packaging solutions with a focus on environmental responsibility.

Note: Dimensions listed are approximate inside dimensions.

Read What Our Happy Customers Are Saying About Us!

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Alpha Rho Inc. IconAlpha Rho Inc.

99 Stevens Road, Fitchburg

5.0 44 reviews

  • We order a box from Alpha Rho whose size we cannot find manufactured anywhere else. This box was out of stock for a while and we were running low on inventory. I reached out to David who helped us come to a solution so we could place an … More order for the boxes. We emailed back and forth and he always answered quickly so we were never waiting for an answer. We received our boxes quickly and were no longer panicking! Great company who helped us out when we were in need. Thank you!
    Jenna Scalici ★★★★★ a month ago
  • We Have done business with Alpha Rho for as long as I remember ( probably 20 years or so ). They are very professional fair and have great great quality items at reasonable prices. I remember a couple of times we try to make a change and … More import from a Chinese factory, then we realized Alpha Rho price was very competitive considering all the factors. I highly recommend them.
    Moore Porsaid ★★★★★ 5 months ago
  • David and his team at Alpha Rho are GREAT to deal with. We love that their products are made in America. They are efficient, offer great pricing, and even better service!
    Samuel Andler ★★★★★ 5 months ago
  • I have been getting boxes from Alpha Rho for many years. Their pricing is reasonable, of excellent quality and they have a very quick turnaround time. Their customer service is outstanding. I highly recommend this company.
    Denise Townsend ★★★★★ 4 months ago
  • Alpha Rho's products are high-quality and the customer service is excellent. David replies to questions promptly and the goods arrive in perfect condition. Alpha Rho is a great company to work with–you will not be disappointed!
    Ken Niehaus ★★★★★ 5 months ago
  • I've been working with Alpha Rho for years now. Wonderful services, extreme easy to deal with, never any problems or issues. Great customer services with quick responses.. Love Ya 🙂
    Cindy Liao ★★★★★ 5 months ago

How Plastic Boxes are Made at Alpha Rho

Wondering how we make rigid plastic boxes at Alpha Rho? Here’s how the magic happens… It all starts with polystyrene resin. In its natural state, polystyrene resin is a clear and rigid material, and is delivered in pellet form to our factory in Fitchburg, Massachusetts. The pellets are filled into a hopper and then fed into the barrel of an injection molding machine. Then the pellets are heated by the barrel’s exterior heater bands, which

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The Effect of the Ukraine War on Resin Prices – How will this Affect your Plastic Box Orders?

Skyrocketing inflation, surging gasoline prices, and the rising cost of goods is not expected to come down anytime soon for Americans. According to Reuters, gas prices are the highest in nearly 17 years, and prices are going up at their fastest rate since the early 1980s. In fact, the CPI climbed to 7.9% in February, and this is the biggest annualized growth in CPI inflation since January 1982. The Ukraine War has caused additional volatility

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