How safe is Tupperware and Signoraware? and What is the difference?

What is the difference between Tupperware and Signoraware? Which one is best and microwave safe?

There is no difference between Signoraware and Tupperware. Technically both are same and certified for food grade. 

Tupperware has been around since the 60s and Signoraware is new. Tupperware has a very good reputation for replacement of lost pieces.

Tupperware is a home products line that includes preparation, storage, and serving products for the kitchen and home. In 1942, Earl Tupper developed his first bell shaped container; the brand products were introduced to the public in 1948.

Tupperware develops, manufactures, and internationally distributes its products as a wholly owned subsidiary of its parent company Tupperware Brands. It is marketed by means of approximately 1.9 million direct salespeople on contract.

In 2013, the top marketplace of Tupperware was Indonesia, which topped Germany as the second. Indonesia's sales in 2013 were more than $200 million with 250,000 sales persons.

SignoraWare is an ISO certified company that gives the assurance of 100% food grade crockery, air and spill-proof containers, innovative user-friendly design, international quality packaging and highly competitive prices to its customers.

SignoraWare is one of the leading plastware companies in India, with quality par excellence when compared to any other international plastware brand. With its well-equipped R&D Department, team of technical experts and warehouse capacity of over 150,000 sq. ft., SignoraWare is committed to setting new benchmarks of superior products for its valued customers.

There are different sorts of plastic, used for different purposes. They are

Most Tupperware & Signoraware containers are made from #4 or #5 plastics. However, some of their products are made from polycarbonate #7, which has been shown to leak the harmful chemical Bisphenol A (BPA) into food items after repeated use. 

The following are some best products from Tupperware and Signoraware. You can get more specification about the products from the following links.

Signoraware Organise Your Kitchen Set, 8-Pieces, Mod Blue

Tupperware New Smart Saver Plastic Container Set, 1.7 Litres, Set of 4

Signoraware Plastic Fridge Bottle Set, 1 litre, Set of 4

Tupperware Bowled Over Plastic Container Set, 450ml, Set of 4